curl --request PUT \
  --url https://yourdomain.com/update_campaign \
  --header 'Content-Type: application/json' \
  --cookie admin_cookie= \
  --data '
{
  "campaign_name": "<string>",
  "mail_data": "<string>",
  "supplied_mail_server": "<string>",
  "supplied_smtp_from": "<string>",
  "supplied_link": "<string>",
  "supplied_id_param": "<string>",
  "supplied_delay": "<string>",
  "secure_mail": true,
  "supplied_username": "<string>",
  "supplied_password": "<string>",
  "dkim": true
}
'

"Updated Campaign"