private function createHttpRequest($content)
	{
		$httpRequest = new \Zend\Http\Request();
		$httpRequest->setUri($this->_endPoint);
		$httpRequest->setMethod(\Zend\Http\Request::METHOD_POST);
		$httpRequest->setContent($content);

		// Set headers
		$headers = $httpRequest->getHeaders();
		
		if (!($headers instanceof \Zend\Http\Headers))
			throw new ClientException('Unable to configure HTTP headers');

		$headers->addHeaderLine('Content-Type', 'application/json');
		$httpRequest->setHeaders($headers);

		return $httpRequest;
	}