{
  "manageEntity": {
    "action": "Save",
    "entityId": "619326214",
    "entityType": "Track",
    "nonce": "0xf65f5b676ec1841175fc937e5f3af36b492f3854b2ec487f8fb6c3dd4c1c8fb0",
    "signature": "0x4ac58d0722e4917ff8bca8228ecfd6ab10dcf0423ba921115f19e436261a94f362d405e7972df76d3682fac90a94e3b1e7ea673302c573ad3fd84adb129e7fd51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}