private function _executeCurlCall($sUrl, $sXml)
    {
        $oCurl = $this->_getCurl();
        $oCurl->setMethod('POST');
        $oCurl->setUrl($sUrl);
        $oCurl->setParameters(['xmlRequest' => $sXml]);
        $oCurl->setOption(
            \OxidEsales\Eshop\Core\Curl::EXECUTION_TIMEOUT_OPTION,
            static::CURL_EXECUTION_TIMEOUT
        );

        return $oCurl->execute();
    }