public function getChannelSubscriptions($modifiedAfter = 0, $cursor = null, $limit = null)
    {
        $data = self::initData($modifiedAfter, $cursor, $limit);

        $subscriptions = Connection::sendCurlRequest(Connection::URL_SUBSCRIPTIONS, 'GET', $data, false,
            $this->apiKey)->subscriptions;

        $objChannels = [];

        foreach ($subscriptions as $s) {
            if (!empty($s->active)) {
                $objChannels[] = new Channel($s, $this->apiKey);
            }
        }

        $this->channels = $objChannels;

        return $objChannels;
    }