{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459523586",
    "entityType": "Track",
    "nonce": "0x8425aae123d3ce73bf207ff14c978701a049c88df8b496ce6e5dbe5f4fa17db7",
    "signature": "0xfdac35e9093c7041e4841c666dd05367d1bcafec7e54c0e5d96b13912af577b1395f893f11d1fd2f66ef60bc91eea023dd0ee494616381cc3aa93412f89db2691c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}