curl -X GET "https://api.tokenlab.sh/v1/management/balance" \
  -H "Authorization: Bearer mt-your-management-token"

{
  "object": "organization_balance",
  "organization_id": "org_123",
  "balance": 42.5,
  "balance_decimal": "42.50",
  "total_recharge": 100,
  "total_recharge_decimal": "100",
  "total_used": 57.5,
  "total_used_decimal": "57.50"
}