{
  "manageEntity": {
    "action": "Save",
    "entityId": "339529",
    "entityType": "Track",
    "nonce": "0x20ed9be57b4f770342fc22e97cd14bacf5522c940450fae0b6c55b2aa52edc50",
    "signature": "0x5d032bab02458177f5d9f06c62f05c99ce54cf070ee510488652213783d8df1b4d6953a52510faadacb547856f13c13ea47f2c7fd51563472351a8efd763e5aa1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}