{
  "manageEntity": {
    "action": "Save",
    "entityId": "1417683837",
    "entityType": "Track",
    "nonce": "0xf648ded042c04c00184b42fe58d29983ac59f48c8645501d9e427f7061d74d39",
    "signature": "0xbae91f5136354963b4b7e06dff1b372c9befd7a53841d247d07ce43ecd24eb0d314aa2e3707e068e73ce5cd13aff8265d8e6d48519364b7ec4df6786a4a2bde01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}