curl --request POST \
  --url http://localhost:8000/api/v1/google-ads/locations/targeting \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "campaign_id": 123,
  "locations": [
    {
      "geo_target_constant_id": 123,
      "target_type": "INCLUDE"
    }
  ]
}
'

{
  "success": true,
  "successful_count": 0,
  "failed_count": 0,
  "errors": [
    {}
  ]
}