{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609760317",
    "entityType": "Track",
    "nonce": "0xa89a5233e8802a62bdc7075f6b553beaa5f0ca71c305f64ee4e8a9fc91526edb",
    "signature": "0xf45ed531b491ba68684658f2dea009e249cdf7b2e39f61faf7c7e749cdc855e910037c2376908fa8b0c24315556b066319556289896d8cf2005b6450d20301181c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}