Survey results in encrypted form

Hello all, I tried to get the survey results by using the following steps:
1) I made a get requests to get the list of survey Id's
2) Later, I used a post request to get the progress Id for one survey Id
3) using that progress Id I made a get request to get the file Id
4) Then I made a final get request for the survey results pertaining to a specific survey Id.
But ended up giving special charecters. I tried both postman and Qlik but gave the same results.

So, Can you please help me fixing this issue!