public function postRequest($path, $options, $addApiKey)
    {
        if (isset($options['source']) && is_array($options['source'])) {
            $sources = $options['source'];
            unset($options['source']);
            foreach ($sources as $i => $source) {
                $options["source[$i]"] = $source;
            }
        }

        $response = $this->makeRequest('POST', $path, $options, $addApiKey);
        return $this->parseResponse($response);
    }