JSON formatting

I am reading a json data from an api response.
response eg:
“First_name”: “Achal”,
When i read it and save it in the file using the below code, the file response will not be as above. It will be in the “” separated format. how can i save the data in the above format in a file or type text in the above format in a notepad?

code to read json response and save it a file.

put api().responseBody into res
put res’s JSONFormat into file (“C:\Users

Result file data looks like this:
{“First_name”: “Achal”,“Last_Name”:“A”}