JSON deserialization (proper way?)

var jsonObject = JsonDocument.Parse(inputJson);
IReponseObject returnObject = null;

if (jsonObject.RootElement.TryGetProperty("error", out JsonElement error))
{
    throw new Exception($"Issue found in response: \"{error.ToString()}\"");
}

if (jsonObject.RootElement.TryGetProperty("event", out JsonElement jsonEvent))
{
    switch (jsonEvent.ToString())
    {
        case "authenticate":
            returnObject = JsonSerializer.Deserialize<AuthenticatedResponse>(jsonObject);
            break;
        default:
            break;
    }
}

if (jsonObject.RootElement.TryGetProperty("action", out JsonElement jsonAction))
{
    switch (jsonAction.ToString())
    {
        case "getTime":
            responseContent = jsonObject.RootElement.GetProperty("response");
            IReponseObject = JsonSerializer.Deserialize<TimeResponse>(responseContent);

            break;
        case "getPressure":
            responseContent = jsonObject.RootElement.GetProperty("response");
            IReponseObject = new PressureResponse() { Pressures = new List<Pressure>() };
            if (responseContent.ValueKind == JsonValueKind.Object)
            {
                var pressure = JsonSerializer.Deserialize<PressureResponse>(responseContent);
                (IReponseObject as PressureResponse).Pressure.Add(Pressure);
            }
        else
        {
        var pressure = JsonSerializer.Deserialize<List<PressureResponse>>(responseContent);
                (IReponseObject as PressureResponses).Pressures.AddRange(Pressure);
        }
            break;
}