public function getListMetaData($databaseID) {
        $data["Envelope"] = array(
            "Body" => array(
                "GetListMetaData" => array(
                    "LIST_ID" => $databaseID,
                ),
            ),
        );
        $response = $this->_request($data);
        $result = $response["Envelope"]["Body"]["RESULT"];
        if ($this->_isSuccess($result)) {
            return $result;
        } else {
            throw new \Exception("Silverpop says: ".$response["Envelope"]["Body"]["Fault"]["FaultString"]);
        }
    }