Cool project!
This block should do the trick! Basically, this block will convert the json object into a list of pairs where the first item is the key and the second item is the value. For example, {"name": "brian", "age": 26} will become
[
[
"name",
"brian"
],
[
"age",
26
]
]
where the lists are lists in NetsBlox, of course. NetsBlox provides some libraries for working with structured data like this (under "Libraries" in the file menu).
I played with a copy of your published project and ended up with something like:
Is that what you are looking for?