Importer deletes slashes from postmeta

I got some custom postmeta values with slashes "\"

For example:

... {"shortcode":"link","content":"<a href=\"http://ift.tt/1yA6cxq\">link</a>", ...

The wordpress importer deletes these slashes "\" which is bad, because there are needed to be read correctly. The import xml file contains the salshes so the removing happens during the import.

I need to find a solution to prevent this. Do have any idea?

Thank you