{
  "manageEntity": {
    "action": "Save",
    "entityId": "406073",
    "entityType": "Track",
    "nonce": "0x0ac56c88bbf4b26e21d6adbb29d8f27f3afcd8927fe352ee78dc6950436ea4ea",
    "signature": "0xab30bf67faeacb614003856edfe6c90432790c68c54965ea18f32f578242cbdb083bc4bb916b9b59b85c50472f45e3cf2827f67658d962ee489d2bb9e862ad171c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}