Pigment.json

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

obj={
  "request_date": "2021-04-01T04:45:11Z",
  "request_date_ms": 1617252311177,
  "subscriber": {
    "entitlements": {
      "premium_access": {
        "expires_date": "2021-04-06T11:59:41Z",
        "grace_period_expires_date": null,
        "product_identifier": "com.pixite.pigment.1weekM",
        "purchase_date": "2021-03-30T11:59:41Z"
      }
    },
    "first_seen": "2021-03-30T11:55:30Z",
    "last_seen": "2021-04-01T04:45:11Z",
    "management_url": "itms-apps://apps.apple.com/account/subscriptions",
    "non_subscriptions": {},
    "original_app_user_id": "BF8B9DFB-E054-4054-A00D-9A5B8D10DB79",
    "original_application_version": "521",
    "original_purchase_date": "2021-02-19T14:12:22Z",
    "other_purchases": {},
    "subscriptions": {
      "com.pixite.pigment.1weekM": {
        "billing_issues_detected_at": null,
        "expires_date": "2021-04-06T11:59:41Z",
        "grace_period_expires_date": null,
        "is_sandbox": false,
        "original_purchase_date": "2021-03-30T11:59:42Z",
        "ownership_type": "PURCHASED",
        "period_type": "trial",
        "purchase_date": "2021-03-30T11:59:41Z",
        "store": "app_store",
        "unsubscribe_detected_at": "2021-04-01T00:15:38Z"
      }
    }
  }
}
$done({body: JSON.stringify(obj)});