curl --request GET \
  --url https://api.myscalev.com/v3/stores/{store_id}/customers/me/subscription-items/{id}/downgrade \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "currency": "IDR",
      "id": 123,
      "images": [
        "<string>"
      ],
      "interval": "day",
      "interval_count": 123,
      "item_type": "physical",
      "name": "<string>",
      "price": 123,
      "pricing_type": "one_time",
      "product_name": "<string>",
      "unique_id": "<string>",
      "validity_period": 123,
      "validity_period_unit": "day"
    }
  ],
  "is_paginated": false
}