Sample Google Sheet project?

Also, how do I update only one cell? In the update value block above, it’s affecting the entire row, not just the JSON response column. My spreadsheet looks like this:

Cell B2 contains a formula: =a2. When I press enter in cell B2, the cell in B2 changes to “filler” as I would expect. But if I then run the blocks above in Thunkable, A2 remains as “filler” but B2 changes to the text string “filler”. It’s no longer a formula.