{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635849048",
    "entityType": "Track",
    "nonce": "0xd8aa4804fb5345a8db672f2990a0f2f4d23d2f283dd37c6134bd15bad8202515",
    "signature": "0x785209b5d60971b7cbb178090513d65ba2e218194f860df0f0d91ab4a8dce3de11a5200d9ba5e870effd3b6ef79102d8b7c2e507fc7010720cb9e7b365824cf71c",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}