public async Task <IActionResult> Upload(IFormFile file)
        {
            int newId;

            using (var stream = new MemoryStream())
            {
                await file.CopyToAsync(stream);

                newId = await _model.AddSong(file.FileName, stream);
            }
            var createdSong = _model.GetSongById(newId);

            return(Ok(JsonConvert.SerializeObject(createdSong)));
        }