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 {
    "id": "order_I4rOK0TqFk3nxF",
    "entity": "order",
    "amount": 200000,
    "amount_paid": 0,
    "amount_due": 200000,
    "currency": "INR",
    "receipt": "recipt by me",
    "offer_id": null,
    "status": "created",
    "attempts": 0,
    "notes": [],
    "created_at": 1633263345
}
 

Преобразуйте строку в объект Json, затем получите доступ к свойствам:

 var jsonData = 
{"id":"order_I4rOK0TqFk3nxF","entity":"order","amount":200000,"amount_paid":0,"amount_due":200000,"currency":"INR","receipt":"recipt by me","offer_id":null,"status":"created","attempts":0,"notes":[],"created_at":1633263345}

var id = JSON.parse(jsonData).id;