{
  "manageEntity": {
    "action": "Save",
    "entityId": "51359",
    "entityType": "Track",
    "nonce": "0xac80971ad5aa753ba612c4101f85b9b8a920cccf52cf269e2a88198358541d40",
    "signature": "0x2169daad8ead1db8603a6d7831d3cec7a79c805cbca7d7ea82333938635336cf44dc66b0232978bda7eeeca3d4bbe18619370e12c7f613a344edafb5b6d7e12e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}