How to pass TimeSpan value in JSON format?

The simple approach is to parse the timespan as a string and converting to a TimeSpan using its static 'parse' routine.

What is the . NET type of "sub"? It looks like a collection or array type of some sort; what is the type that .

NET expects those elements to have? Does that type have the properties Type, StartDate, EndDate, and Duration? Does it have any other properties that are marked with IsRequiredAttribute but not present?

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