curl --request PATCH \
  --url https://api.scribe-mail.com/v1/signatures/{signature_id}/variants/{kind} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "variant": {
    "activated": true,
    "hidden": true,
    "show_marketing_campaigns": true
  }
}
'

{
  "data": {
    "exists": true,
    "id": "<string>",
    "activated": true,
    "hidden": true,
    "show_marketing_campaigns": true,
    "content": {},
    "draft_content": {},
    "last_published_at": "2023-11-07T05:31:56Z",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}