update_avatar

 {
            "actionId": "1387129595600",
            "controlId": "1028935457225",
            "content": {
                "flag": 0,
                "act": "update_avatar",
                "data": "{\"subType\":0,\"groupId\":\"1672779924600957210\",\"creatorId\":\"8071492288997554991\",\"groupName\":\"SO1052 - TIW Linh ?àm\",\"sourceId\":\"8071492288997554991\",\"updateMembers\":[],\"groupSetting\":null,\"groupTopic\":null,\"info\":null,\"extraData\":null,\"time\":\"1763696535996\",\"avt\":\"https://s120-ava-grp-talk.zadn.vn/b/4/3/2/2/120/b3117e36fe9c1af7cdc258de730eaf29.jpg\",\"fullAvt\":\"https://ava-grp-talk.zadn.vn/b/4/3/2/2/360/b3117e36fe9c1af7cdc258de730eaf29.jpg\",\"isAdd\":0,\"hideGroupInfo\":0,\"version\":\"1763696534509\",\"groupType\":0}",
                "act_type": "group",
                "ts": 1763696535996
            }
        }