{
  "manageEntity": {
    "action": "Save",
    "entityId": "202351498",
    "entityType": "Track",
    "nonce": "0xedc73298931b543b40d8540a85118a52c4240a1973e1b9a210ef00a9e7feb2cf",
    "signature": "0xb75c27bc8c7904695270be294a6155b4f42f8658cb28ed067481e501379e5bee7fb7ba81b00f32e6a041057d23a763122e6548eaed44d1a07c3bd9c675382fcf1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}