{
  "manageEntity": {
    "action": "Save",
    "entityId": "1639883615",
    "entityType": "Track",
    "nonce": "0xb066e1f134a38f383227fbd269c93de70e68e0de1a3f5de361a8419ec22ca7d6",
    "signature": "0xa7dc9b60018a436adfb39450be17a8c7c39da4931fb3c2f78f398dc2d980abc855e4bba17c4950a7e91b292537d946baa243c9167f8db37028c419db927ba7501b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}