curl --request POST \
  --url https://api.supersonic.cv/lists/add_field \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "list_id": "<string>",
  "name": "<string>",
  "field_type": "<string>",
  "slug": "<string>",
  "config": {},
  "required": true,
  "order": 123
}
'

{}