curl --request PUT \
  --url https://api.sumvin.com/v0/cards/{card_id}/funding \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "source_type": "wallet",
  "wallet_address": "<string>",
  "wallet_chain_id": 123,
  "fiat_account_id": "<string>"
}
'

{
  "_links": {},
  "id": "<string>",
  "source_type": "<string>",
  "wallet_address": "<string>",
  "fiat_account_id": "<string>",
  "configured": false,
  "message": "<string>"
}