{
  "$schema": "https://www.atsc-schemas.org/atsc3.0/a344/20260218/org.atsc.launchApp-request.json",
    "jsonrpc": "2.0",
    "method": "org.atsc.launchApp",
    "params": {"appId": "https://pbs.org/kids/1"},
    "id": 42
}