OK, after reading your reply to my question above, I can more accurately answer.
First, contrary to Fuxia's comment, the move you played, 4...Nc6, is actually more popular now at higher levels than Botvinnik's 4...e6. To quote GM John Shaw's 2016 book:
4...Nc6 is more popular these days and can be viewed as slightly more ambitious, as well as somewhat ...
This line, the Botvinnik-Carls Defense, is my pet opening as Black. :)
The critical move after 4.dxc5 is e6! If White tries to hold the pawn with Be3, you answer that with Nd7. In many lines after that you have a way to get the pawn back or get the bishop pair and a much better pawn structure.
See the annotated example below.