{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685105582",
    "entityType": "Track",
    "nonce": "0x664c7016e214c516a34cfe46bdd8f32398fff0d03d9cfb5641359aba62e40916",
    "signature": "0xcac594a1ae4c8ebc79272793953a9591624ae11be5e199ba6c8cc9c9d19195145689e98324d7aaed40f4098c53e753ae2724f09fb1420ee378623ca5759f117b1c",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}