Extracting from JSON using Regular expression Extrator

[Shaba K]

Hi All,

I am stuck with getting this extraction right

here's my JSON snippet

{
:
"params":"authp=nonce.style&style=mock&nonce=T3LOmVN6YMl4KZGTJTyOJholMQ0&psig=MnJNx0_iWJfADsh7C5-IbwCLfZM",
:   "type":"reCAPTCHA",
:   "public_key":"6LciS7oSAAAAAG8P5umXg9j_65IsvR1lboEYaqJ-",
:   "server":"https://www.google.com/recaptcha/api";,
:   "command":"create_captcha"
}


i need to extract value of nonce & psig


am passing

nonce
"params":"(.+?)"
$1$
-1
REGEX_FAILED

Am bit of no vice on Reg extractor.