{
  "id": .....
  "cmd": "UN_SUBSCRIBE_ALL"
}

{
  "id": "{req_id}",
  "cmd": "UN_SUBSCRIBE_ALL",
  "success": true,
  "time": {timestamp},
  "data": ["topic1", "topic2"]
}

Unsubscribe from all currently subscribed topics in a single command.

{
  "id": .....
  "cmd": "UN_SUBSCRIBE_ALL"
}

{
  "id": "{req_id}",
  "cmd": "UN_SUBSCRIBE_ALL",
  "success": true,
  "time": {timestamp},
  "data": ["topic1", "topic2"]
}