{
  "manageEntity": {
    "action": "Save",
    "entityId": "371847184",
    "entityType": "Track",
    "nonce": "0xc923ff4d026c030b6fe94186c52e7f852228c7c6c77340e4a521a4396f952729",
    "signature": "0xe117086d9c84c034f60c8af4ec63f9b9890d3ed2389e81dde9c7300f9fac62050f0df697ed38a46df693f43ebcafab2487b2135b0d8bfad4233ef2a04ab5b2b41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}