{
  "manageEntity": {
    "action": "Save",
    "entityId": "48214",
    "entityType": "Track",
    "nonce": "0x4915a3878f9a01b36e76232218b977d17162d8b3c7ce1909ff218a06d3dadde3",
    "signature": "0x487b16f6f9891910fe26839e120603ad82b9065d3cfe134bf068700e0d7b428538ea46a3fcf834ff942911dc5118839be74b14abeb454df14bdee392b55d1e431c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}