Async Task Without await

General.cs

[HttpPost]
publicJsonResult Wait(int time)
{
    Task.Factory.StartNew(() => {
      Thread.Sleep(time);
      Debug.WriteLine("Done " + time);
    });

    return APPActor.GetJson(new
    {
        msg = time
    });
}

Problem.cs

[HttpPost]
public async Task<JsonResult> Wait(int time)
{
    // This will go to doen't working.
    Task.Factory.StartNew(() => {
      Thread.Sleep(time);
      Debug.WriteLine("Done " + time);
    }).ConfigureAwait(false);

    return await APPActor.GetJsonAsync(new
    {
        msg = time
    });
}