Jmeter change the POST request when Json body contain blanket and slash

**moon** ([Bug 63986](https://bz.apache.org/bugzilla//show_bug.cgi?id=63986&redirect=false)):
Please review my post here https://stackoverflow.com/questions/59170591/jmeter-change-the-post-request-when-json-body-contain-branket-and-slash/59175934#59175934

This issue happen when POST request Json body contain both \\\ and {} character.
After sending this request, Jmeter will change \\\ to \\ and it leads to incorrect request and in my case it shows 500 server error.

Severity: normal
OS: All