{
  "manageEntity": {
    "action": "Save",
    "entityId": "536566",
    "entityType": "Track",
    "nonce": "0x5a08e404041cecb4fc612f64cb569f2a4046806865416fa004c0cfdd48506525",
    "signature": "0x50a9c2a48f52c7c3fc535821973eb3d4067570e09659415cd91771661396854d4e6ccb9175634c47e6e2e946c6ae4adcbe9e6799d9f604e8af544ebe4883d3521c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}