{
  "manageEntity": {
    "action": "Save",
    "entityId": "433915625",
    "entityType": "Track",
    "nonce": "0xeffea9020d41c052920fd5495f29c6dc5aade0bd6738f549bcabf12d6c363511",
    "signature": "0x72da58ee1a1a4fd7e6eb9c0595cda8177b9add1ddabf65da194f107385cba6bf493a8a2496047b9d933af3d327cf3c692f330c5f922172d622a69b577ce9c1561c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}