{
 "GroupId":"@TGS#2TTV7VSII",
 "MsgSeq": 1,
 "Filter": 1,        // `0`: Pull the list of members who have read the message; `1`: Pull the list of members who have not read the message
 "Cursor":"",      // Position of the last member pulled. Enter "" for the first request
 "Count":5           // Maximum number of members to pull
}

{
    "ActionStatus": "OK",
    "Cursor": "0",
    "ErrorCode": 0,
    "ErrorInfo": "",
    "IsFinish": 1,     // The list is fully pulled. No further pull is required. 
    "MsgSeq": 1,  
    "ReadList": [    // List of members who have read the message
        {
            "Read_Account": "test1"
        }
    ]
}

{
  "ActionStatus": "OK",
  "Cursor": "144115213529088617", // `Cursor` value to be passed in for the next request
  "ErrorCode": 0,
  "ErrorInfo": "",
  "IsFinish": 0,   // The list is not fully pulled, and further pull is required.
  "MsgSeq": 1,
  "UnreadList": [  // List of members who have not read the message
      {
          "Unread_Account": "test"
      },
      {
          "Unread_Account": "test6"
      },
      {
          "Unread_Account": "test3"
      },
      {
          "Unread_Account": "test5"
      },
      {
          "Unread_Account": "test4"
      }
  ]
}