{
  "manageEntity": {
    "action": "Save",
    "entityId": "433110323",
    "entityType": "Track",
    "nonce": "0x6eddcbcfc6efdb0fa826681e7730029f0ccc3980897296be2bfa5c3c0e5cc3fe",
    "signature": "0x2cb69ad7c4672a1c83bb758dd05c75863b9a533217e1b46b1d32e6422c02c3f8437cae7461294e5ceae83ba4888e083150789060bd37a7c444c723a6875021c61c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}