{
  "manageEntity": {
    "action": "Save",
    "entityId": "208969960",
    "entityType": "Track",
    "nonce": "0x581e413b93e263e7986ef670459941f88eb50cf9bfe48ea68bc17f91523316d4",
    "signature": "0xeeb4803972596535d2fba1652f52609d208cd9f0eddfbef28f5d958adf7c98ec69931cec78f6fd72f79b8cacfecfa4fbc89e5ffdee4149d94806a54f58157a331b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}