An object can be passed as a message by converting it into a JSON string:
JSON.stringify({propertyOne: 'abc', propertyTwo: 5}) var lo_payload = { 'msg:'<requested message>' }; function successCallback(po_result) { //Enter any code that will be executed in case of success } function errorCallback(po_result) { //Enter any code that will be executed in case of error } this.callConnector("<connector-name>", lo_payload, successCallback, true, true, errorCallback);