{
  "id": 42,
  "jsonrpc": "2.0",
  "method": "public/subscribe",
  "params": {
    "channels": [
      "announcements"
    ]
  }
}

{
  "data": {
    "action": "<string>",
    "body": "<string>",
    "confirmation": true,
    "id": 123,
    "important": true,
    "publication_timestamp": 123,
    "title": "<string>",
    "unread": 123
  }
}