{
  "manageEntity": {
    "action": "Save",
    "entityId": "1025261949",
    "entityType": "Track",
    "nonce": "0xd4da045d283bdc9e0526eb2446dcdfeac4430fb1a7aeb82ad811170cb3cc2584",
    "signature": "0xa5838f9a5a83262bf4fd47726435aab8c84667583223164a046b3821fca197f558417b46f5d938921040c958234a3824090219e2a5f362a6a57ee83cc6b661c61c",
    "signer": "0x380Fe18384267CA159c9Db6737B959099be2a515",
    "userId": "381292764"
  }
}