How to exclude blocks from a page using NginX?

Question

Nginx

Good afternoon colleagues.
I'm using proxy_pass to display a page with a tilde. That is, I made a free page on tilde, and in order not to bash 650 rubles a month in order to be able to use my domain, I decided to register proxying on the already existing nginx. In general, the design works. Opening the domain opens my tilde site from their internal domain. However, at the bottom of the page there is such a nuisance as a block with links to the tilde itself, and my question is this: Is it possible to exclude any block from the page using nginx?
That is, I need to finally get nginx to cut out the tilde advertisement from their original page.

Answer 1

https://www.nginx.com/resources/wiki/modules/subst...
seems to be what you need