{
  "manageEntity": {
    "action": "Save",
    "entityId": "1634392285",
    "entityType": "Track",
    "nonce": "0x612dc94fa66aa79e7f7596a9be9a49f516ad169714ea150619002e3d88862ea6",
    "signature": "0x718d7b4e3c7aa3c57dbb3cc2b3868df1dd85afe25d1caf73dd7f0fc628a6ecbd4c46f16fe091a8c311c3606b9e97c204174ab64012326b2120b1faa2c7e5b7251c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}