Nginx reverse proxy gzip for json payload

[blason]

Hi Team,

I currently have IIS server and I am planning to put reverse proxy server in
front of that IIS server. Since this IIS server carries a huge request in
every request that is around 40-50 Mb of data is being uploaded at every
transaction I need to enable gzip on for the server. However I see only 
html/text files can be gzipped and if any specific other data needs to be
gzipped then needs to be defined.

Can someone please tell me if json data can be achieved with gzip on?

TIA
Blason R

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,294276,294276#msg-294276