curl --request GET \
  --url https://sandbox.layerfi.com/v1/businesses/{businessId}/time-tracking/time-entries/summary \
  --header 'Authorization: Bearer <token>'

{
  "total_minutes": 123,
  "total_billable_minutes": 123,
  "total_billable_amount": 123,
  "by_customer": [
    {
      "total_minutes": 123,
      "total_billable_minutes": 123,
      "total_billable_amount": 123,
      "entry_count": 123,
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>"
    }
  ],
  "by_service": [
    {
      "total_minutes": 123,
      "total_billable_minutes": 123,
      "total_billable_amount": 123,
      "entry_count": 123,
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>"
    }
  ]
}