https://xxxxxx/v4/group_open_http_svc/import_group_msg?sdkappid=88888888&identifier=admin&usersig=xxx&random=99999999&contenttype=json

{
    "GroupId": "@TGS#2C5SZEAEF",
    "RecentContactFlag":1,// Means to trigger conversation update (This field is not supported by AVChatRoom groups.)
    "MsgList": [
        {
            "From_Account": "leckie", // Message sender
            "SendTime":1620808101,
            "Random": 8912345, // Random number of the message (optional)
            "MsgBody": [ // Message body, which consists of an element array. For details, see the `TIMMessage` message object.
                {
                    "MsgType": "TIMTextElem", // Text
                    "MsgContent": {
                        "Text": "red packet"
                    }
                },
                {
                    "MsgType": "TIMFaceElem", // Emoji
                    "MsgContent": {
                        "Index": 6,
                        "Data": "abc\\u0000\\u0001"
                    }
                }
            ],
            "CloudCustomData": "your cloud custom data"
        },
        {
            "From_Account": "peter", // Message sender
            "SendTime":1620892821,
            "MsgBody": [ // Message body, which consists of an element array. For details, see the `TIMMessage` message object.
                {
                    "MsgType": "TIMTextElem", // Text
                    "MsgContent": {
                        "Text": "red packet"
                    }
                }
            ],
            "CloudCustomData": "your cloud custom data"
        }
    ]
}

{
    "GroupId": "@TGS#2C5SZEAEF",
    "SendMsgControl": ["NoMsgCheck"],
    "MsgList": [
        {
            "From_Account": "peter", // Specifies the message sender
            "SendTime": 1620892821,
            "MsgBody": [ // Message body, composed of an array of elements. Refer to the TIMMessage object for details.
                {
                    "MsgType": "TIMTextElem", // Text
                    "MsgContent": {
                        "Text": "red packet"
                    }
                }
            ],
            "To_Account": ["brennanli2", "brennanli3"] // Specifies the message recipients (up to 50 members). If this field is used, the message will not count as unread.
        }
    ]
}

{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 0,
    "ImportMsgResult": [
        {
            "MsgSeq": 1,
            "MsgTime": 1620808101,
            "Result": 0
        },
        {
            "MsgSeq": 2,
            "MsgTime": 1620892821,
            "Result": 0
        },
    ]
}