square brackets confuse the parser

Hello, while parsing a body like the following, qs fails:

buttons[commands.identifier_orders_merge_action|{"orders":["47441","47440"]}]=Unisci+ordini

This becomes something like:

'buttons[commands.identifier_orders_merge_action|{"orders":': { '"47441","47440"': 'Unisci ordini' }

while it should be something more similar to this:

'buttons[commands.identifier_orders_merge_action|{"orders":{ '"47441","47440"}]': 'Unisci ordini'