You can do it the following way...
[rnd_var]
type=extract
front1=name="message"
front2=name="
back="
[*STEPX]
add fixed data=%rnd_var%=%blog_comment%
Comments
You can do it the following way...
[rnd_var]
type=extract
front1=name="message"
front2=name="
back="
[*STEPX]
add fixed data=%rnd_var%=%blog_comment%