{
  "manageEntity": {
    "action": "Save",
    "entityId": "1723566456",
    "entityType": "Track",
    "nonce": "0x12d78442660a38ce28c5f0152e8fc4e1808084f7e17f7860f250a70302456127",
    "signature": "0xf57f4a9ee3c3099c520a9411c411628dac52c2cd7f2c57ab53b3c669792ef51b2a7f3b0a39fda4def6d47a1f429add5a38b2fe66672456d0d80699e1833649ed1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}