{
  "$schema": "https://www.atsc-schemas.org/atsc3.0/a344/20260218/org.atsc.unsubscribe-response.json",
    "jsonrpc": "2.0",
    "result": {
        "msgType": ["rmpMediaTimeChange", "rmpPlaybackStateChange", "rmpPlaybackRateChange"]
    },
    "id": 52
}