{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837413172",
    "entityType": "Track",
    "nonce": "0x338b3e481fba7d81d9f47a76f292b5202c44b85ca64c7e066f0acef7d2a6a4b6",
    "signature": "0x98c165265c256bb300a2aeada17c6e835446468b339424f5fa46246fc511fd6b29c979cb491520326458105330cc12f17df7fee7ca60c8f99e9ae1c9ba802d021c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}