curl --request DELETE \
  --url https://api.zapier.com/actions/v1/stored-actions/{stored_action_id} \
  --header 'Authorization: Bearer <token>'

{
  "errors": [
    {
      "status": 400,
      "code": "bad_request",
      "title": "Bad Request",
      "detail": "Improperly formatted or incompleted request",
      "source": null,
      "meta": {}
    }
  ]
}