Request message format

Description

subscribe

subscribe

{
  "method": "subscribe",
  "params": [
    "{topic}@{arg},{arg}",
    "{topic}@{arg}"
  ],
  "id": "{id}"     //call back ID
}

unsubscribe

unsubscribe

{
  "method": "unsubscribe",
  "params": [
    "{topic}@{arg},{arg}"
  ],
  "id": "{id}"     //call back ID
}