{
  "manageEntity": {
    "action": "Save",
    "entityId": "286112",
    "entityType": "Track",
    "nonce": "0x8e378be1f01abb8b9bee6baf1201f36f7f63ff690f1dbfb0d8f5f781d98f9175",
    "signature": "0xbde48556528f03a73d02dca0b828cc29b89a95493ee11287363ac68d4ebd179424eaa048a7cfb605540752f7a43a1201e15de39796a273b1d2fdaf07a19a57881c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}