curl --request POST \
  --url https://nimbussuite.com/api/v1/billing/payment-method \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "customerId": "<string>"
}
'

{
  "paymentMethod": {
    "id": "<string>",
    "card": {},
    "billing_details": {}
  }
}