set {_json} to new json from string "{'A': {}, 'B': [], 'C': {'G': {}}}"
add false to {_json}                      # example 1
add "A:test;false" to {_json}          # example 2
add "C:G:test;A" to {_json}            # example 3

# Show case 1
{"A": {}, "B": [], "C": {"G": {}}, "3": false}
# Show case 2
{"A": {"test": false}, "B": [], "C": {"G": {}}}
# Show case 3
{"A": {}, "B": [], "C": {"G": {"test": "A"}}}