diff --git a/app/config/parameters.yml.dist b/app/config/parameters.yml.dist
index 48232d5..7e31c09 100644
--- a/app/config/parameters.yml.dist
+++ b/app/config/parameters.yml.dist
@@ -12,6 +12,11 @@ parameters:
     mailer_user:       ~
     mailer_password:   ~
 
+    point_base_url:    https://point.im/
+    point_api_base_url: https://point.im/api/
+    point_use_https: true
+    point_login: point-tools
+
     locale:            en
 
     # A secret key that's used to generate certain security-related tokens
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Command/UpdateSubscriptionsCommand.php b/src/Skobkin/Bundle/PointToolsBundle/Command/UpdateSubscriptionsCommand.php
new file mode 100644
index 0000000..7052c6c
--- /dev/null
+++ b/src/Skobkin/Bundle/PointToolsBundle/Command/UpdateSubscriptionsCommand.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Skobkin\Bundle\PointToolsBundle\Command;
+
+
+use Skobkin\Bundle\PointToolsBundle\Service\SubscriptionsManager;
+use Skobkin\Bundle\PointToolsBundle\Service\UserApi;
+use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class UpdateSubscriptionsCommand extends ContainerAwareCommand
+{
+    protected function configure()
+    {
+        $this
+            ->setName('point:update:subscriptions')
+            ->setDescription('Update subscriptions of users subscribed to service')
+            ->addOption(
+                'check-only',
+                null,
+                InputOption::VALUE_NONE,
+                'If set, command will not perform write operations in the database'
+            )
+            // @todo add option for checking only selected user
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        /** @var UserApi $api */
+        $api = $this->getContainer()->get('skobkin_point_tools.api_user');
+        /** @var SubscriptionsManager $subscriptionsManager */
+        $subscriptionsManager = $this->getContainer()->get('skobkin_point_tools.subscriptions_manager');
+
+        $serviceUserName = $this->getContainer()->getParameter('point_login');
+        $serviceUser = $this->getContainer()->get('doctrine.orm.entity_manager')->getRepository('SkobkinPointToolsBundle:User')->findOneBy(['login' => $serviceUserName]);
+
+        if (!$serviceUser) {
+            // @todo Retrieving user
+        }
+
+        $serviceSubscribers = $api->getUserSubscribersByLogin($serviceUserName);
+
+        // Updating service subscribers
+        $subscriptionsManager->updateUserSubscribers($serviceUser, $serviceSubscribers);
+
+        // Updating service users subscribers
+        foreach ($serviceSubscribers as $user) {
+            $userCurrentSubscribers = $api->getUserSubscribersByLogin($user->getLogin());
+
+            $subscriptionsManager->updateUserSubscribers($user, $userCurrentSubscribers);
+
+            // @todo some pause for lower API load
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Entity/SubscriptionEvent.php b/src/Skobkin/Bundle/PointToolsBundle/Entity/SubscriptionEvent.php
index 981912e..2b98686 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/Entity/SubscriptionEvent.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/Entity/SubscriptionEvent.php
@@ -13,6 +13,7 @@ use Doctrine\ORM\Mapping as ORM;
  *      @ORM\Index(name="date_idx", columns={"date"})
  * })
  * @ORM\Entity
+ * @ORM\HasLifecycleCallbacks
  */
 class SubscriptionEvent
 {
@@ -58,6 +59,17 @@ class SubscriptionEvent
      */
     private $action;
 
+
+    /**
+     * @ORM\PrePersist
+     */
+    public function onCreate()
+    {
+        if (!$this->date) {
+            $this->date = new \DateTime();
+        }
+    }
+
     /**
      * Get id
      *
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Resources/config/services.yml b/src/Skobkin/Bundle/PointToolsBundle/Resources/config/services.yml
index 6b09cc5..f81d137 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/Resources/config/services.yml
+++ b/src/Skobkin/Bundle/PointToolsBundle/Resources/config/services.yml
@@ -1,10 +1,18 @@
 services:
     skobkin_point_tools.http_client:
         class: %guzzle.client.class%
-        arguments: [ "http://point.im/" ]
+        arguments: [ "%point_base_url%" ]
         tags:
             - { name: guzzle.client }
 
     skobkin_point_tools.api_user:
         class: Skobkin\Bundle\PointToolsBundle\Service\UserApi
-        arguments: [ @skobkin_point_tools.http_client ]
+        arguments:
+            - @skobkin_point_tools.http_client
+            - "%point_use_https%"
+            - "%point_api_base_url%"
+            - @doctrine.orm.entity_manager
+
+    skobkin_point_tools.subscriptions_manager:
+        class: Skobkin\Bundle\PointToolsBundle\Service\SubscriptionsManager
+        arguments: [ @doctrine.orm.entity_manager ]
\ No newline at end of file
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Service/AbstractApi.php b/src/Skobkin/Bundle/PointToolsBundle/Service/AbstractApi.php
index cb79f4a..2bcdea5 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/Service/AbstractApi.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/Service/AbstractApi.php
@@ -6,7 +6,12 @@ use Guzzle\Service\Client;
 use Guzzle\Http\Message\Request as GuzzleRequest;
 use Guzzle\Http\Message\Response as GuzzleResponse;
 
-// @todo Implement commands: https://github.com/misd-service-development/guzzle-bundle/blob/master/Resources/doc/serialization.md
+/**
+ * @todo Implement commands
+ * @see https://github.com/misd-service-development/guzzle-bundle/blob/master/Resources/doc/serialization.md
+ * @see https://github.com/misd-service-development/guzzle-bundle/blob/master/Resources/doc/clients.md
+ * @see https://github.com/misd-service-development/guzzle-bundle/blob/master/Resources/doc/param_converter.md
+ */
 class AbstractApi
 {
     /**
@@ -14,24 +19,146 @@ class AbstractApi
      */
     protected $client;
 
-    public function __construct($httpClient)
+    /**
+     * @var bool Use HTTPS instead of HTTP
+     */
+    protected $useHttps;
+
+    /**
+     * @param Client $httpClient HTTP-client from Guzzle
+     * @param bool $https Use HTTPS instead of HTTP
+     * @param string $baseUrl Base URL for API
+     */
+    public function __construct(Client $httpClient, $https = true, $baseUrl = null)
     {
         $this->client = $httpClient;
+        $this->useHttps = ($https) ? true : false;
+
+        if ($baseUrl) {
+            $this->setBaseUrl($baseUrl);
+        }
     }
 
     /**
      * Make GET request and return Response object
-     *
-     * @param string $pathTemplate
-     * @param array $parameters
+     **
+     * @param string $path Request path
+     * @param array $parameters Key => Value array of query parameters
      * @return GuzzleResponse
      */
-    public function sendGetRequest($pathTemplate, array $parameters = [])
+    public function sendGetRequest($path, array $parameters = [])
     {
-        $path = vsprintf($pathTemplate, $parameters);
-
+        /** @var $request GuzzleRequest */
         $request = $this->client->get($path);
 
+        $query = $request->getQuery();
+
+        foreach ($parameters as $parameter => $value) {
+            $query->set($parameter, $value);
+        }
+
         return $request->send();
     }
+
+    /**
+     * Make GET request and return data from response
+     *
+     * @param string $path Path template
+     * @param array $parameters Parameters array used to fill path template
+     * @param bool $decodeJsonResponse Decode JSON or return plaintext
+     * @param bool $decodeJsonToObjects Decode JSON objects to PHP objects instead of arrays
+     * @return array|string
+     */
+    public function getGetRequestData($path, array $parameters = [], $decodeJsonResponse = false, $decodeJsonToObjects = false)
+    {
+        $response = $this->sendGetRequest($path, $parameters);
+
+        if ($decodeJsonResponse) {
+            if ($decodeJsonToObjects) {
+                return json_decode($response->getBody(true));
+            } else {
+                return $response->json();
+            }
+        } else {
+            return $response->getBody(true);
+        }
+    }
+
+    /**
+     * Make POST request and return data from response
+     * @todo implement method
+     */
+    public function getPostRequestData()
+    {
+
+    }
+
+    /**
+     * Get HTTP client base URL
+     *
+     * @return string Base URL of client
+     */
+    public function getBaseUrl()
+    {
+        return $this->client->getBaseUrl();
+    }
+
+    /**
+     * Set HTTP client base URL
+     *
+     * @param string $baseUrl Base URL of API
+     * @param bool $useProtocol Do not change URL scheme (http/https) defined in $baseUrl
+     * @return $this
+     */
+    public function setBaseUrl($baseUrl, $useProtocol = false)
+    {
+        // Overriding protocol
+        if (!$useProtocol) {
+            $baseUrl = str_replace(['http://', 'https://',], ($this->useHttps) ? 'https://' : 'http://', $baseUrl);
+        }
+        // Adding missing protocol
+        if ((false === strpos(strtolower($baseUrl), 'http://')) && (false === strpos(strtolower($baseUrl), 'https://'))) {
+            $baseUrl = (($this->useHttps) ? 'https://' : 'http://') . $baseUrl;
+        }
+
+        $this->client->setBaseUrl($baseUrl);
+
+        return $this;
+    }
+
+    /**
+     * Check if API service uses HTTPS
+     *
+     * @return bool
+     */
+    public function isHttps()
+    {
+        return $this->useHttps;
+    }
+
+    /**
+     * Enable HTTPS
+     *
+     * @return $this
+     */
+    public function enableHttps()
+    {
+        $this->useHttps = true;
+        $this->setBaseUrl($this->getBaseUrl());
+
+        return $this;
+    }
+
+    /**
+     * Disable HTTPS
+     *
+     * @return $this
+     */
+    public function disableHttps()
+    {
+        $this->useHttps = false;
+        $this->setBaseUrl($this->getBaseUrl());
+
+        return $this;
+    }
 }
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Service/SubscriptionsManager.php b/src/Skobkin/Bundle/PointToolsBundle/Service/SubscriptionsManager.php
new file mode 100644
index 0000000..a9b0a8a
--- /dev/null
+++ b/src/Skobkin/Bundle/PointToolsBundle/Service/SubscriptionsManager.php
@@ -0,0 +1,126 @@
+<?php
+
+namespace Skobkin\Bundle\PointToolsBundle\Service;
+
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\QueryBuilder;
+use Skobkin\Bundle\PointToolsBundle\Entity\Subscription;
+use Skobkin\Bundle\PointToolsBundle\Entity\SubscriptionEvent;
+use Skobkin\Bundle\PointToolsBundle\Entity\User;
+
+class SubscriptionsManager
+{
+    /**
+     * @var EntityManager
+     */
+    protected $em;
+
+
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        $this->em = $entityManager;
+    }
+
+    /**
+     * @param User $user
+     * @param User[]|array $newSubscribersList
+     */
+    public function updateUserSubscribers(User $user, $newSubscribersList = [])
+    {
+        /** @var Subscription[] $tmpOldSubscribers */
+        $tmpOldSubscribers = $user->getSubscribers();
+
+        $oldSubscribersList = [];
+
+        foreach ($tmpOldSubscribers as $subscription) {
+            $oldSubscribersList[] = $subscription->getSubscriber();
+        }
+
+        unset($tmpOldSubscribers);
+
+        $subscribedList = $this->getUsersListsDiff($newSubscribersList, $oldSubscribersList);
+        $unsubscribedList = $this->getUsersListsDiff($oldSubscribersList, $newSubscribersList);
+
+        /** @var User $subscribedUser */
+        foreach ($subscribedList as $subscribedUser) {
+            $subscription = new Subscription();
+            $subscription
+                ->setAuthor($user)
+                ->setSubscriber($subscribedUser)
+            ;
+
+            $user->addSubscriber($subscription);
+
+            $logEvent = new SubscriptionEvent();
+            $logEvent
+                ->setSubscriber($subscribedUser)
+                ->setAuthor($user)
+                ->setAction(SubscriptionEvent::ACTION_SUBSCRIBE)
+            ;
+
+            $user->addNewSubscriberEvent($logEvent);
+
+            $this->em->persist($subscription);
+            $this->em->persist($logEvent);
+        }
+
+        unset($subscribedList);
+
+        /** @var QueryBuilder $unsubscribedQuery */
+        $unsubscribedQuery = $this->em->getRepository('SkobkinPointToolsBundle:Subscription')->createQueryBuilder('s');
+        $unsubscribedQuery
+            ->delete()
+            ->where('s.author = :author')
+            ->andWhere('s.subscriber IN (:subscribers)')
+        ;
+
+
+        /** @var User $unsubscribedUser */
+        foreach ($unsubscribedList as $unsubscribedUser) {
+            $logEvent = new SubscriptionEvent();
+            $logEvent
+                ->setSubscriber($unsubscribedUser)
+                ->setAction($user)
+                ->setAction(SubscriptionEvent::ACTION_UNSUBSCRIBE)
+            ;
+
+            $user->addNewSubscriberEvent($logEvent);
+
+            $this->em->persist($logEvent);
+        }
+
+        $unsubscribedQuery
+            ->setParameter('author', $user->getId())
+            ->setParameter('subscribers', $unsubscribedList)
+            ->getQuery()->execute();
+        ;
+
+        unset($unsubscribedList);
+
+        $this->em->flush();
+    }
+
+    /**
+     * Compares $list1 against $list2 and returns the values in $list1 that are not present in $list2.
+     *
+     * @param User[] $list1
+     * @param User[] $list2
+     * @return User[] Diff
+     */
+    public function getUsersListsDiff(array $list1 = [], array $list2 = [])
+    {
+        $hash1 = [];
+        $hash2 = [];
+
+        foreach ($list1 as $user) {
+            $hash1[$user->getId()] = $user;
+        }
+        foreach ($list2 as $user) {
+            $hash2[$user->getId()] = $user;
+        }
+
+        return array_diff_key($hash1, $hash2);
+    }
+}
\ No newline at end of file
diff --git a/src/Skobkin/Bundle/PointToolsBundle/Service/UserApi.php b/src/Skobkin/Bundle/PointToolsBundle/Service/UserApi.php
index ea370d5..352d1cc 100644
--- a/src/Skobkin/Bundle/PointToolsBundle/Service/UserApi.php
+++ b/src/Skobkin/Bundle/PointToolsBundle/Service/UserApi.php
@@ -2,6 +2,10 @@
 
 namespace Skobkin\Bundle\PointToolsBundle\Service;
 
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+use Guzzle\Service\Client;
 use Skobkin\Bundle\PointToolsBundle\Entity\User;
 
 /**
@@ -13,10 +17,27 @@ class UserApi extends AbstractApi
     const PATH_USER_SUBSCRIPTIONS = '/api/user/%s/subscriptions';
     const PATH_USER_SUBSCRIBERS = '/api/user/%s/subscribers';
 
+    const AVATAR_SIZE_SMALL = '24';
+    const AVATAR_SIZE_MEDIUM = '40';
+    const AVATAR_SIZE_LARGE = '80';
+
     /**
      * @var string Base URL for user avatars
      */
-    protected $avatarsBaseUrl = '//i.point.im/a/';
+    protected $avatarsBaseUrl = 'point.im/avatar/';
+
+    /**
+     * @var EntityManager
+     */
+    protected $em;
+
+
+    public function __construct(Client $httpClient, $https = true, $baseUrl = null, EntityManagerInterface $entityManager)
+    {
+        parent::__construct($httpClient, $https, $baseUrl);
+
+        $this->em = $entityManager;
+    }
 
     public function getName()
     {
@@ -24,33 +45,68 @@ class UserApi extends AbstractApi
     }
 
     /**
-     * Get user subscribers by his/her name
+     * Get user subscribers by user login
      *
      * @param string $login
      * @return User[]
      */
     public function getUserSubscribersByLogin($login)
     {
-        $response = $this->sendGetRequest(self::PATH_USER_SUBSCRIBERS, [$login]);
+        $usersList = $this->getGetRequestData('/api/user/' . $login . '/subscribers', [], true);
 
-        $body = $response->getBody(true);
-
-        // @todo use JMSSerializer
-        $data = json_decode($body);
-
-        $users = [];
-
-        if (is_array($data)) {
-            foreach ($data as $apiUser) {
-                $user = new User();
-                $user->setId($apiUser->id);
-                $user->setLogin($apiUser->login);
-                $user->setName($apiUser->name);
-
-                $users[] = $user;
-            }
-        }
+        $users = $this->getUsersFromList($usersList);
 
         return $users;
     }
+
+    /**
+     * @return User[]
+     */
+    private function getUsersFromList(array $users = [])
+    {
+        if (!is_array($users)) {
+            throw new \InvalidArgumentException('$users must be an array');
+        }
+
+        /** @var EntityRepository $userRepo */
+        $userRepo = $this->em->getRepository('SkobkinPointToolsBundle:User');
+
+        $resultUsers = [];
+
+        foreach ($users as $userData) {
+            if (array_key_exists('id', $userData) && array_key_exists('login', $userData) && array_key_exists('name', $userData) && is_numeric($userData['id'])) {
+
+                // @todo Optimize with prehashed id's list
+                $user = $userRepo->findOneBy(['id' => $userData['id']]);
+
+                if (!$user) {
+                    $user = new User();
+                    $user->setId((int) $userData['id']);
+                    $this->em->persist($user);
+                }
+
+                // Updating data
+                if ($user->getLogin() !== $userData['login']) {
+                    $user->setLogin($userData['login']);
+                }
+                if ($user->getName() !== $userData['name']) {
+                    $user->setName($userData['name']);
+                }
+
+                $resultUsers[] = $user;
+            }
+        }
+
+        $this->em->flush();
+
+        return $resultUsers;
+    }
+
+    /**
+     * @param $login
+     */
+    public function getAvatarUrl(User $user, $size)
+    {
+        return ($this->useHttps ? 'https://' : 'http://') . $this->avatarsBaseUrl . $user->getLogin() . '/' . $size;
+    }
 }