User Profile

We are seeing many purchase attempts coming our way where in InAppPurchase has transacion id in Microsoft GUID fromat (e.g. 'EE46F2D9-3F51-4043-A1AE-7199E91EEE26')So this is example of purchase user tried to buy (some fields has been slightly modified for privacy reasons){ "quantity": "1", "product_id": "mega_coin_pack_2", "transaction_id": "EE46F2D9-3F51-4043-A1AE-7199E91EEE26", "original_transaction_id": "110000548814335", "purchase_date": "2019-04-23 20:43:26 Etc/GMT", "purchase_date_ms": "1556052202000", "purchase_date_pst": "2019-04-23 13:43:26 America/Los_Angeles", "original_purchase_date": "2019-04-23 20:43:26 Etc/GMT", "original_purchase_date_ms": "1556052206000", "original_purchase_date_pst": "2019-04-23 13:43:26 America/Los_Angeles", "is_trial_period": "false" }Is this format new to transaction id in Apple, or is this an attempt of cheet?If cheet, does anyone know of a system user could have been using? User claims Apple has refused to help and had asked us to deal with this case.