{
  "manageEntity": {
    "action": "Save",
    "entityId": "592641584",
    "entityType": "Track",
    "nonce": "0x88d6cf52bd730eee7f4fce2c766069034edb57c9c34410bd2dbefc35d7dfe844",
    "signature": "0xf5137b19c0523b867fd4e2b7415687a59e3bb6b5180b29a68e9073abfcef64df0f904d88c89898ee9a13323ecf40ac246d2ac15ecbea2f0a9d02ebcb91077dde1b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}