conf_event(群组会议事件)

{
    "type": "conference",
    "operation": "add",
    "groupid": "string",
    "confInfo": {
        "mode": 0
    },
    "member": {
        "id": 0,
        "memberID": "string",
        "memberType": "PU",
        "defaultConf": true,
        "status": 0,
        "deviceId": "string",
        "memberName": "string",
        "name": "string",
        "current": true,
        "video": {
            "id": "string",
            "index": 0
        }
    }
}