Escape curl braces in TextTransform

[fleed]

I'm trying to use TextTransform with an nginx.conf file.
The file contains braces {, and if I run the cake task with transformation I get the following error:

Error: Input string was not in a correct format.

I can escape the brace using a double character ({{), but then the output contains the same sequence ({{) instead of what I need ({).

I've found this closed issue: #380 but I think that it doesn't work in my case because of closing braces.

Example (working):

var text = TransformText("{").ToString();

Example (not working, throws the mentioned error):

var text = TransformText("{something}").ToString();