How to send String value containing double curly brace in HTTP Request

Question

When sending a String value containing double curly brace in HTTP Request, the String value will be treated as a variable.

Answer

Create a variable to store the String value containing double curly brace:

< {% 
    request.variables.set("variable", "{{foo.bar}}"); 
%} 

POST ***************************
Content-Type: application/json 

{ 
"key" : "{{variable}}" 
}