{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044772",
    "entityType": "Track",
    "nonce": "0x63bd71f7b9a32452878eede4623de7aace977865819ac489313e4971ec0b0e35",
    "signature": "0x04e89fb447d38291d165b8a5d1f7c6c456498d4deea5603fcf91147e76b5c18b2acd7217be4bd6de098227f11d5e4a0a8b725e7342f660e321f889824f5622e61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}