curl --request GET \
  --url https://api.topsort.com/public/v1/offsite-ads/reporting/campaigns/{campaign-id} \
  --header 'Authorization: Bearer <token>'

{
  "impressions": {
    "total": 123,
    "charged": 123,
    "adSpent": 123,
    "adSpentDecimal": "<string>"
  },
  "clicks": {
    "total": 123,
    "charged": 123,
    "adSpent": 123,
    "adSpentDecimal": "<string>"
  },
  "purchases": {
    "amount": 123,
    "count": 123,
    "quantity": 123,
    "countByProduct": {}
  }
}