The .json files are simple text files, open them in a text editor and copy the contents, then you "import" the example into the administration section of OWS (where you do your coding).
Basically go to the "home" tab/ribbon menu and you'll see a "import" option. Past the code where you see the "place configuration here" and click "Save", the code will then appear in the next window. Note the config you just imported is not saved into your code library until you "publish" (a.k.a save) the config.
Hope that helps, TJ