{
  "manageEntity": {
    "action": "Save",
    "entityId": "1407969381",
    "entityType": "Track",
    "nonce": "0xbafa2beaf845522ec3bef240e9700022a9c829746e8a6542be7104c51fa0e85a",
    "signature": "0x1ffce64c9a8dc70f222996ef95f25edcb2091a5be1e942b34cea96f6281afcbe508429580567ba5915bb9c01874526589c0f0f9b9c186a14f40b028f8123903b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}