Query user group names

for example: http://api.shinemonitor.com/public/?sign=45a0317337cad1b975b7cc8e6ae35401daa5c356&salt=6799118618252297881&token=5b13e18eaa179d4bdce4cf2cc0e66eaa506c7f27ccac6b9e7beaa190ec0e386f&action=queryUsrGroup&uid=256&source=0&_app_client_=android&_app_id_=com.demo.test&_app_version_=3.6.2.1

response：

{
    "err":0,
    "desc":"ERR_NONE",
    "dat":{
            "id":"597f1fa2849cac1dcc86f50d",
            "group":"group00"
    }
}