[Square] A response to `POST /v2/locations/{location_id}/transactions/{transaction_id}/refund`

The API specification: docs.connect.squareup.com/api/connect/v2#endpoint-createrefund

{
	"refund": {
		"amount_money": {
			"amount": 100,
			"currency": "USD"
		},		
		"created_at": "2016-02-12T00:28:18Z",
		"id": "b27436d1-7f8e-5610-45c6-417ef71434b4-SW",
		"location_id": "18YC4JDH91E1H",
		"reason": "some reason",
		"status": "PENDING",
		"tender_id": "TENDER_ID",
		"transaction_id": "TRANSACTION_ID"
	}
}