Add headers and then forward to other domain Apache?

Hello.

I am currently building a gps fleet management application and I have made the gps devices send its location messages to my Apache server.

It receives the messages, but, because of my Incapsula DDoS protection, it discards them or something similar. Basically, it can only receive messages/requests with http headers, if I'm not mistaken.

So, I have installed a nginx server in another domain/location , not localhost, and now I want to:

-Receive the messages on this nginx server
-Add http headers (to make Apache accept the messages/requests)
-Forward it to the Apache server.

Do you think that's possible? Can anyone help me on that? I am new to Nginx, unfortunately.

Thank you in advance, cheers!