{
  "manageEntity": {
    "action": "Save",
    "entityId": "1196403601",
    "entityType": "Track",
    "nonce": "0x1dd012c7c54212226885b445cecaefe4000f88f6e5c0988b36372cff1a397c29",
    "signature": "0x59046446a2d2aab29c685d7e5d9ac0b371827555f306ab40270df971a7d1f61f33d0f8214de844a28ce12a58774abbae319bd9051ab366c574a08d3a6c2a7d961c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}