{
    "message_id": "list of integers"
}

{
    "all_messages_have_been_seen_by_user": "all messages have been seen by user",
    "must_login": "user must be login",
    "no_valid_messages": "message_id is wrong or user is not a member of chat, or user is sender of message"
}

• Url:

• Output:

                                {
    "status": "success",
    "time": 1526966340.437936
}