{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988016875",
    "entityType": "Track",
    "nonce": "0xa968547d202686b7518d8559a1d2e8e967229aaeaf639be8cd1ed040bc4b9b45",
    "signature": "0x062cbf181bc2af97e94f0ac3e6efad6c5957ff4c2c978def52c382612e4ba397692a09bf1cf32c75b6e32912ec95b4b31eb07c159b6b2b25d5b26aef808dadb01b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}