curl --request POST \
  --url https://api.mixpeek.com/v1/organizations/billing/confirm-payment-method \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "payment_method_id": "<string>"
}
'

{
  "payment_method": {
    "payment_method_id": "<string>",
    "type": "<string>",
    "card_last4": "<string>",
    "card_brand": "<string>"
  },
  "auto_billing_enabled": true,
  "billing_period_start": "2023-11-07T05:31:56Z",
  "success": true
}