{
  "eventId": "whe_fooD944t4VUKkaDT",
  "eventType": "subscription.checkout_opened",
  "eventTime": 1729608043615,
  "subscriptionId": "sub_fooBOwYsaK50AEfK",
  "metadata": { 
    "orderId": "12345",
    "customerNote": "Deliver after 5 PM" 
  }
}

{
  "eventId": "whe_fooD944t4VUKkaDT",
  "eventType": "subscription.checkout_opened",
  "eventTime": 1729608043615,
  "subscriptionId": "sub_fooBOwYsaK50AEfK",
  "metadata": { 
    "orderId": "12345",
    "customerNote": "Deliver after 5 PM" 
  }
}
​
eventId
string
A unique identifier for this specific event. This ensures that each event can be tracked and processed individually.
​
eventType
string
Describes the type of event. In this case, it signifies that a subscription’s checkout page has been opened.
​
eventTime
integer
The timestamp when the event was generated, typically in milliseconds since the Unix epoch (January 1, 1970). This value can be used to track when the event occurred.
​
subscriptionId
string
A unique identifier for the specific subscription whose checkout page was opened.
​
metadata
object
A collection of key-value pairs that were provided when the object was created. These metadata values are echoed back in the response, allowing you to store and retrieve custom information such as context-specific attributes, references, or tags. This can be useful for correlating records in your system or attaching meaningful context to transactions.