curl --request POST \
  --url https://api.zapkey.io/group/create/{instance} \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '
{
  "subject": {},
  "description": "<string>",
  "participants": [
    "<string>"
  ]
}
'

This response has no body data.