Send body on rest command

Hi all,
I need to call a parsehub project giving a body parameter. How I can do on a restfull_command ?

I made a test with postman and it works nicely but I don’t know where to write the body start_url parameter

The wget command is

wget --no-check-certificate --quiet \
  --method POST \
  --timeout=0 \
  --header '' \
  --body-data 'start_url=' \

I find various syntax with no luck

     method: POST
     payload: start_url=""

did you get it to work?