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=https://www.example.com/ETAservice/#/it/etaservice/ID' \
   'https://www.parsehub.com/api/v2/projects/PRJID/run?api_key=APIKEY'

I find various syntax with no luck

rest_command:
  parsehub_call:
     url: https://www.parsehub.com/api/v2/projects/PRJID/run?api_key=APIKEY
     method: POST
     payload: start_url="https://www.example.com/ETAservice/#/it/etaservice/ID"

did you get it to work?