{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040510",
    "entityType": "Track",
    "nonce": "0xc0277772ae024211870c3625f8425d500c19130bd1bffa2168be31177930e35b",
    "signature": "0xf88f52321c0d02f850696747c64e3d7ca4776336ee28f11cfffbb12b6e906a6147d482600ccf71c3365967af9bb6b318e1e97aca25b3cbd0a1dc754adb8858951b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}