{
  "manageEntity": {
    "action": "Save",
    "entityId": "1024657564",
    "entityType": "Track",
    "nonce": "0xfc9f1ca8dce81dee8f5faeaf5b77c369f03d0a30cd8de10cd7a57c48e72f9f7f",
    "signature": "0xd724214664a66da1883fe5ed5439bd74e4a21f9afd76205c61b0156a6f5c1b7950c539c9f5c9eee66b939569f5e8a42255812bd43e565571a135f019b3d217e51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}