curl --request GET \
  --url https://api.leanrails.com/v1/payment_methods/{id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "id": "<string>",
  "object": "payment_method",
  "type": "<string>",
  "livemode": true,
  "created": 123,
  "customer": "<string>",
  "card": {}
}