curl --request POST \
  --url http://localhost:8000/api/v1/google-ads/keywords \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ad_group_id": 123,
  "keywords": [
    {
      "text": "<string>",
      "match_type": "PHRASE"
    }
  ]
}
'

{
  "successful_operations": [
    {
      "ad_group_id": 123,
      "criterion_id": 123,
      "success": true,
      "resource_name": "<string>",
      "error": "<string>"
    }
  ],
  "failed_operations": [
    {
      "ad_group_id": 123,
      "criterion_id": 123,
      "success": true,
      "resource_name": "<string>",
      "error": "<string>"
    }
  ]
}