Benkyo.json

var obj = JSON.parse($response.body);

obj={
  "request_date": "2021-01-15T15:04:01Z",
  "request_date_ms": 1610723041631,
  "subscriber": {
    "entitlements": {
      "pro": {
        "expires_date": "2022-01-18T15:01:55Z",
        "grace_period_expires_date": null,
        "product_identifier": "benkyo.pro.ars.yearly.default",
        "purchase_date": "2021-01-15T15:01:55Z"
      }
    },
    "first_seen": "2021-01-15T15:00:53Z",
    "last_seen": "2021-01-15T15:00:53Z",
    "management_url": "itms-apps://apps.apple.com/account/subscriptions",
    "non_subscriptions": {},
    "original_app_user_id": "$RCAnonymousID:8fd4f313eb784ba0a029480998fcdfbc",
    "original_application_version": "1",
    "original_purchase_date": "2022-01-14T21:13:13Z",
    "other_purchases": {},
    "subscriptions": {
      "benkyo.pro.ars.yearly.default": {
        "billing_issues_detected_at": null,
        "expires_date": "2022-01-18T15:01:55Z",
        "grace_period_expires_date": null,
        "is_sandbox": false,
        "original_purchase_date": "2021-01-15T15:01:56Z",
        "period_type": "trial",
        "purchase_date": "2021-01-15T15:01:55Z",
        "store": "app_store",
        "unsubscribe_detected_at": null
      }
    }
  }
};
$done({body: JSON.stringify(obj)});