{
  "manageEntity": {
    "action": "Save",
    "entityId": "1236273909",
    "entityType": "Track",
    "nonce": "0x39b6de554278feb9306ea6e2e9b446d6e42ae65e6abd2ce7c8c2f4018ff9bd96",
    "signature": "0x9fb43bd4bf39234a424d23255f6046858839db63518dbc0efe39497f349dfab36de817bdba70882d8a93a20ae97546b4b973211b0cdeb4856b31475c7e2e7c201b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}