public function createPushTask( $taskInfo, $additionalParams = array() ) {
        $data = $taskInfo;
        if (!isset($data['ttl'])) {
            $data['ttl'] = 0;
        }
        if( empty($data['title']) || empty($data['website_id']) || empty($data['body']) ) {
            return $this->handleError( 'Not all data' );
        }
        if ($additionalParams) {
            foreach($additionalParams as $key=>$val) {
                $data[$key] = $val;
            }
        }

        $requestResult = $this->sendRequest( '/push/tasks', 'POST', $data );

        return $this->handleResult( $requestResult );
    }