curl -X PATCH "https://api.cryptomate.me/cards/virtual-cards/card_6f1e2a30-4a3c-4b2e-9a1d-5e8c9b7a1f23/virtual-balance" \
  -H "x-api-key: $CRYPTOMATE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "virtual_balance": 2500.00
  }'

2500.00

{
  "code": "VAL",
  "message": "The provided virtual balance amount cannot be negative. Please enter a valid non-negative value."
}