public function pushListWebsites($limit = null, $offset = null)
    {
        $data = array();
        if (null !== $limit) {
            $data['limit'] = $limit;
        }
        if (null !== $offset) {
            $data['offset'] = $offset;
        }

        $requestResult = $this->sendRequest('push/websites', 'GET', $data);

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