You can see how to replace nested values in Clojure in this post.

This code will

• read an edn file
• convert the edn from string to a Clojure data structure
• get the first item in the vector
• recursively replace values inside that map
• convert it back to a map
• print the result on one line to use as a condensed map

(-> (slurp "path/to/file.edn")
    clojure.edn/read-string
    first
    (replace-values :something "something")
    (replace-values :else "else")
    (into {})
    prn)

This is pretty useful if you are creating files with a bunch of test data in it.