I think in this case I translated the JSON wrong.
I refactored the JSON to use the following:
{“city”: {“kolhapur”:{“library1”:{“48 laws of power”:,“founder’s office”:}},“mumbai”:{“library2”:{“founder’s office”:,“the motive”:}},“pune”:{“library3”:{“48 laws of power”:,“the motive”:}}}}
After updating the JSON I got the null value as well, and then I modified the blocks to get the object properties and it worked again.
