{
  "manageEntity": {
    "action": "Save",
    "entityId": "795706731",
    "entityType": "Track",
    "nonce": "1790181383399531887",
    "signature": "0x23b1ec35802a642d4df79addc799e2205f4eb03ba66e39262eab7f9a909027d92cf18604ef486990b263b978adafdf6273428c952c3a003e5174eaa5609707d01c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}