{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696409759",
    "entityType": "Track",
    "nonce": "1789967877697834303",
    "signature": "0xf37caaef82a05981794c9037a1514d7d35aab134b1a6c023b0d267dcb0a5d8f979e0ce75c0349b5c4558aaf6a295675e87bfd1e887609d9d98be521c1891f49a1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}