{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125657",
    "entityType": "Track",
    "nonce": "0x9ffae455b03cc2a643482697808f6c54dbe9dc765be2c38da19860e1ac4e69b2",
    "signature": "0x14c7585250fc4cbef58193f2ed6fd9622a135b14ce92d3062d1ec6425518de1423758fd13844189ec3154c701883d4f6ef3866eea9847b2abd4e26b4cbf785f11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}