public function pushEvent($collectionName, $event) {
        $url = self::BASE_API_URL . $collectionName;
        $result = Request::post($url)
            ->sendsAndExpectsType(Mime::JSON)
            ->addHeaders([
                'X-Project-Id' => $this->projectId,
                'X-Api-Key' => $this->apiKey
            ])
            ->body(json_encode($event))
            ->send();
        return $this->buildResponse($event, $result);
    }