{
  "manageEntity": {
    "action": "Save",
    "entityId": "325139",
    "entityType": "Track",
    "nonce": "0x79db51c32be54afbe5c89fe3e03c1e10cbc2547aa7990900e4718e29477337d0",
    "signature": "0xd52da4542a5e5bd12cde252c477f6d98aa2ddc1758b77503b293e2c132bbdfae0a68b26bfa4d77bd00e146ea036efce1631644187133241e5dd2148c0d1e8a371c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}