This endpoint allows you to update the parameters of an subscription as well as the list of products and amount of the upcoming invoices.
xxxxxxxxxxcurl --request PUT \--url https://app.pennylane.com/api/external/v1/billing_subscriptions/id \--header 'accept: application/json' \--header 'content-type: application/json'
xxxxxxxxxx103}{"billing_subscription": {"id": 0,"next_occurrence": "string","prev_occurrence": "string","stopped_at": "2023-08-30T10:08:08.146343Z","start": "2023-01-01","finish": "2023-12-31","status": "string","mode": "string","email_settings": {},"activated_at": "2023-08-30T10:08:08.146343Z","payment_method": "string","recurring_rule": {"day_of_month": [0],"week_start": 0,"day": [0],"rule_type": "weekly","interval": 0,"count": 12,"until": "string"
