{
  "manageEntity": {
    "action": "Save",
    "entityId": "616413848",
    "entityType": "Track",
    "nonce": "0xcbf2aff9464023181c1f5cefe843e809e776cc6c41e13064644e0cdee3088551",
    "signature": "0xbda754cd688d409c809e95f235170138db014ba554623094d28286b583ce4a342afd3883e68c496a754f283b6f1c1eba6ec40082856328f668f52b4ec9163b7c1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}