Returns information about an account's pool-asset-balances. This is specific to the pool assets pallet for parachains. If no assets
query parameter is provided, all pool-asset-balances for the given account will be returned.
/accounts/{accountId}/pool-asset-balances
SS58 address of the account.
Block height (as a positive integer) or hash (as a hex string).
A list of assetId numbers represented as strings