Retrieves dynamic balance entries for a specific ledger account. The balances returned by this endpoint REPLACE the standard balance display in the Toqio platform. Instead of showing the default two balance fields, the platform will display exactly what the connector returns here. This allows complete customization of which balances are shown (e.g., available balance, pending balance, reserved amounts, etc.) and how they are labeled. IMPORTANT: If the connector returns an empty array or no response, no balances will be displayed to the end user. For detailed implementation guidance, see the Dynamic Balance in Ledger Apps documentation.