De-serializes good, I see the data coming at the Controller and the CommandHandler level, bu I get an error at the end about: JsonSerializationException: Error converting value {null} to type 'System.Decimal'. Path '[1].total', line 1, position 176.
Gerard, can you take a look to that?
If it works with attibutes, let's do it. In parallel I/m opening an issue with the ASP.NET team.