The balances response information.
currencystring<currency_code-2>Requiredtotal_balanceobject<money-2>Requiredcurrency_codestring<currency_code-2>RequiredvaluestringRequiredavailable_balanceobject<money-2>Optionalcurrency_codestring<currency_code-2>RequiredvaluestringRequiredwithheld_balanceobject<money-2>Optionalcurrency_codestring<currency_code-2>RequiredvaluestringRequiredaccount_idstring<account_id>Optionalas_of_timestring<date_time>Optionallast_refresh_timestring<date_time>Optional