curl --request POST \
  --url https://api.heffl.com/api/v2/lead-stages \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "label": "<string>"
}
'

{
  "id": "<string>",
  "label": "<string>",
  "type": "<string>",
  "position": 123
}