@type t() :: %Paypal.Subscription.Info{
  billing_info: Paypal.Subscription.BillingInfo.t() | nil,
  create_time: DateTime.t() | nil,
  custom_id: String.t() | nil,
  id: String.t() | nil,
  links: [Paypal.Common.Link.t()],
  plan: Paypal.Subscription.Plan.Info.t() | nil,
  plan_id: String.t() | nil,
  plan_overridden: boolean() | nil,
  quantity: String.t() | nil,
  shipping_amount: Paypal.Common.CurrencyValue.t() | nil,
  start_time: DateTime.t() | nil,
  status: any() | nil,
  status_change_note: String.t() | nil,
  status_update_time: DateTime.t() | nil,
  subscriber: Paypal.Subscription.Subscriber.t() | nil,
  update_time: DateTime.t() | nil
}

Subscription details:

• id - The unique subscription ID (e.g. I-BW452GLLEP1G).
• plan_id - The ID of the billing plan.
• start_time - Date and time when the subscription starts.
• quantity - The subscription quantity.
• shipping_amount - The shipping amount for the subscription.
• subscriber - Information about the subscriber.
• billing_info - Billing details and cycle executions.
• create_time - Date and time when the subscription was created.
• update_time - Date and time when the subscription was last updated.
• custom_id - Custom ID provided by the API caller.
• plan_overridden - Whether the plan was overridden.
• plan - Embedded plan details if requested with ?fields=plan.
• status - The subscription status (:approval_pending, :approved, :active, :suspended, :cancelled, :expired).
• status_change_note - Note explaining reason for last status change.
• status_update_time - Date and time of last status change.
• links - HATEOAS links.