Network tab
CONTOURS
ROADS
UTILITIES
HEADLANDS
RIDGES
VALLEYS
PIPING
FENCES
BOUNDARY
PONDS
BUILDINGS
FIELD_BOUNDARIES
CLU_BOUNDARIES

Open in new tab (easiest, but won’t work if too much time has passed since reloading). Alternatively, copy the text from the Response tab or Open in Sources panel
.json extension (eg. boundary.json)

Or if you copied the text directly, paste it into a new file in a text editor and save it with the .json extension