{
  "manageEntity": {
    "action": "Save",
    "entityId": "578784565",
    "entityType": "Track",
    "nonce": "0x804ae2eb7685381ec8fcce2004a12455fba48bff26ec971e785b93302fdf963c",
    "signature": "0x6d294121c75f24edd510e5c076d02729ebfa0fa58c439fd36e0af356fd9e9dde57e3b815c819dd0a5ebd54d66e094ed338fc238ab4b85a5e9e44522118d814dd1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}