Click the Data tab, and select 'Get Data> From File > From JSON'
Choose the file you downloaded
Click 'To Table' in the top left and select OK
At the top of the first row it'll say "Column1". Click the expand arrows next to 'Column1'
and unselect 'Use original column names as prefix' and hit OK
Select 'Close & Load' in the top left. The json data should now show up as a table