curl --request GET \
  --url https://api.paubox.net/v1/orca/{username}/analytics/campaign_mailing_send_totals \
  --header 'authorization: <api-key>'

{
  "data": {
    "delivered": 123,
    "viewed": 123,
    "clicked": 123,
    "bounced": 123,
    "soft_bounced": 123,
    "hard_bounced": 123,
    "unsubscribed": 123,
    "global_unsubscribed": 123
  }
}