I like the "Simple Encoding Notation" (SEN) of the underlying library: https://github.com/ohler55/ojg/blob/develop/sen.md

" A valid example of a SEN document is:

{ one: 1 two: 2 array: [a b c] yes: true } "

An interesting observation: if you move the colon on the opposite side then you get valid EDN data!

{:one 1 :two 2 :array [a b c] :yes true}

cf. https://github.com/edn-format/edn

Likewise, commas are considered whitespace. They are sometimes added to make lengthy maps easier to read.