curl --request POST \
  --url https://api.example.com/api/activity/activities.show-totals \
  --header 'Content-Type: application/json' \
  --data '
{
  "filters": [
    {
      "key": "activity.date_range",
      "value": "2019-11-11/2019-12-12"
    }
  ]
}
'

{
  "total": "PT1H30M20S",
  "billable": "PT1H30M20S",
  "validated": "PT1H30M20S",
  "non_validated": "PT1H30M20S",
  "rejected": "PT1H30M20S",
  "non_submitted": "PT1H30M20S"
}