public function LinkTracking($from = null, $to = null, $limit = 0, $offset = 0, $channelName = null) {
        return $this->sendRequest('log/linktracking', array(
                    'from' => $from,
                    'to' => $to,
                    'limit' => $limit,
                    'offset' => $offset,
                    'channelName' => $channelName
        ));
    }