{
  "manageEntity": {
    "action": "Save",
    "entityId": "457733",
    "entityType": "Track",
    "nonce": "0xd0bcd03cb2708f52f3fe62cbf5e333cbb8d7964631064efcc0a786dfb62cee63",
    "signature": "0xc1b932ad3a447a2a03cc8ef601dfd1c44d785adb1f9d59aac5180c5dc836b90365c1f16f5ad984e61e6234379832c08b93ac811e1a88f2413d6dd99256339c721b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}