How to convert tuple to JSON?

[alexeypetrushin]

Seems like [nim currently doesn't support JSON for 
tuples]([https://github.com/nim-lang/Nim/issues/12290](https://github.com/nim-lang/Nim/issues/12290))

Is there any workaround, maybe convert tuple to map or object and then convert 
it to json or something like that?
    
    
    import json
    
    echo %(a: 1, b: 2)
    
    
    Run