{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984014769",
    "entityType": "Track",
    "nonce": "0x75d4f769b2528e58df258b62433bf35eb28e316ddf50be9a590c91133d194a7d",
    "signature": "0x337125df5060a038e72d9af296d0008689f6dec0126ac4e2c9185a3d4ef2e1c948762855de110e374ba2ce0b10602ddc38176a7c0df3089c5a419be170cae33f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}