Restful objects decoding json request body?

[Erik de Hair]

Hi,

I have a json-string with a '+'-sign in a value fired at the restful interface.

Example json:
{"hashedUsername":{"value":"c9151beda37570547e36ce66910573a4"},"password":{"value":"abc+def"},"passwordRepeated":{"value":"abc+def"}}

This string is directly put into the PUT request as body. The value in my 
action-method (called by the restful call) looks URL-decoded because the 
'+'-sign is replaced by a whitespace.

Is this expected behaviour? Can this be manipulated/configured?

Erik