{
  "$schema": "https://www.atsc-schemas.org/atsc3.0/a344/cs-20250508/org.atsc.notify-rmpPlaybackRateChange.json",
    "jsonrpc": "2.0",
    "method": "org.atsc.notify",
    "params": {
        "msgType": "rmpPlaybackRateChange",
        "playbackRate": 2
    }
}