curl --request GET \
  --url https://apix.us.amity.co/realtime/marker.marker.user-sync

{
  "userMarkers": [
    {
      "userId": "<string>",
      "lastSyncAt": "2023-11-07T05:31:56Z",
      "unreadCount": 123,
      "isMentioned": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "userFeedMarkers": [
    {
      "userId": "<string>",
      "entityId": "<string>",
      "feedId": "<string>",
      "readToSegment": 123,
      "deliveredToSegment": 123,
      "unreadCount": 123,
      "lastMentionSegment": 123,
      "isMentioned": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "userEntityMarkers": [
    {
      "userId": "<string>",
      "entityId": "<string>",
      "unreadCount": 123,
      "isDeleted": true,
      "isMentioned": true,
      "membership": "member",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ]
}