Как узнать дату следующей оплаты на подписку Paypal?

Question

[Emil Revencu]

Подписка Paypal была создана формой:

<form id="paypalform" action="https://www.paypal.com/" method="post">
	<input type="hidden" name="cmd" value="_xclick-subscriptions">
	<input type="hidden" name="business" value="[e-mail]">
	<input type="hidden" name="item_name" value="AAA">
	<input type="hidden" name="item_number" value="BBB">
	<input type="hidden" name="no_shipping" value="1">
	<input type="hidden" name="p3" value="1">
	<input type="hidden" name="t3" value="M">
	<input type="hidden" name="src" value="1">
	<input type="hidden" name="sra" value="1">
	<input type="hidden" name="no_note" value="1">
	<input type="hidden" name="rm" value="2">
	<input type="hidden" name="modify" value="0">
	<input type="hidden" name="currency_code" value="USD">
	<input type="hidden" name="return" value="https://mywebsite.com/paypal_ok">
	<input type="hidden" name="custom" value="20">
<input type="hidden" name="a3" value="50.00">
</form>

Как позже узнать дату следующей оплаты?
Пробовал через вызов API:

https://api.paypal.com/v1/billing/subscriptions/I-ABCD12345'

но в ответе

{
    "details": [
        {
            "issue": "INVALID_RESOURCE_ID", 
            "description": "Requested resource ID was not found."
        }
    ], 
    "message": "The specified resource does not exist.", 
    "name": "RESOURCE_NOT_FOUND", 
    "links": [
        {
            "href": "https://developer.paypal.com/docs/api/v1/billing/subscriptions#RESOURCE_NOT_FOUND", 
            "method": "GET", 
            "rel": "information_link"
        }
    ], 
    "debug_id": "**********"
}