curl --request GET \
  --url http://localhost:8000/api/v1/campaigns/drafts/{draft_id}/rsas \
  --header 'Authorization: Bearer <token>'

{
  "rsas": [
    {
      "id": 123,
      "ad_group_id": 123,
      "headlines": [
        {
          "text": "<string>",
          "pinned_field": "HEADLINE_1",
          "reason": "<string>"
        }
      ],
      "descriptions": [
        {
          "text": "<string>",
          "pinned_field": "HEADLINE_1",
          "reason": "<string>"
        }
      ],
      "final_url": "<string>",
      "final_mobile_url": "<string>",
      "display_path_1": "<string>",
      "display_path_2": "<string>",
      "tracking_url_template": "<string>",
      "generation_status": "pending",
      "generation_task_id": "<string>",
      "generation_error": "<string>"
    }
  ]
}