{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003711991",
    "entityType": "Track",
    "nonce": "0x1332e3ca44bc7337ac1fb256e7b6b433cecb4e32579ea36352b38de94c631a4e",
    "signature": "0x3663a077af1cf4b5bb61464d48ba3fe829d2e4387d884713b805a5fe55ea52890cfb5255fa1d594b4e0c4f666c6ec028aad1b9c75b2c25e6e53c8f9e55e624141c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}