{
  "manageEntity": {
    "action": "Save",
    "entityId": "898322781",
    "entityType": "Track",
    "nonce": "0x7460e7eb6983bc14c365531ac0205813b04a6f892fe2c7c10a138d0bdd0a14da",
    "signature": "0x365219f47cc31793a89cfceb32d80be7385ce1169a2c7cea4ddc68634786c9ea12e6afbfb143275a5c03138b0786485a35b5dcaf6dbd8fe8bc620ffee948b7601b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}