{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089991432",
    "entityType": "Track",
    "nonce": "0x842fdad6260e5e0d20fd4fb0ff63590b6395fd7f72085637003e003c14a75cfb",
    "signature": "0xf9779c1ee35b81a7c9abbca3ced08c99a7a2818843bd29b407482978c57de74b7e3ec45152770d21d69665e59c38c610e42e7a311b04d1940fc44fbf0fb415cf1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}