curl --request PUT \
  --url https://api.mudstack.com/accounts/subscriptions \
  --header 'Authorization: Bearer <token>' \
  --header 'x-account-id: <x-account-id>'

{
  "account_id": "<string>",
  "stripe_customer_id": "<string>",
  "status": "<string>",
  "licenses": 123,
  "frequency": "yearly",
  "contact": "<string>"
}