curl --request GET \
  --url https://api.byteful.com/1.0/public/user/service_adjustment/retrieve/{service_adjustment_id} \
  --header 'X-API-Private-Key: <api-key>' \
  --header 'X-API-Public-Key: <api-key>'

{
  "data": {
    "invoice_id": "in_1NpRIvB2BUlqim5lN4v3URka",
    "service_adjustment_creation_datetime": "2023-09-14 18:30:00",
    "service_adjustment_eval": {
      "service_expiry_datetime": [
        "2023-09-14 18:30:00",
        "2024-09-14 18:30:00"
      ]
    },
    "service_adjustment_id": 213,
    "service_adjustment_is_administrator": false,
    "service_adjustment_is_automatic": true,
    "service_adjustment_is_customer": true,
    "service_adjustment_last_update_datetime": "2023-09-15 18:30:00",
    "service_adjustment_post": {
      "service_expiry_datetime": "2024-09-14 18:30:00"
    },
    "service_adjustment_pre": {
      "service_expiry_datetime": "2023-09-14 18:30:00"
    },
    "service_adjustment_status": "complete",
    "service_adjustment_type": "extension",
    "service_id": "API-1234-5678"
  },
  "message": "Service Adjustment successfully retrieved."
}