Creating a bundle via REST API

Hello,

I want to create a product bundle via Woocommerce REST API.

As “type” I chose ‘woosb’ and that all works fine. I just can’t find out how to add the products I want to add to the bundle.
I tried it like that:

    'woosb_ids' => [
        [
            'id' => 6820,
            'qty' => 1
        ]
    ],

but that doesn’t work. Also I want the “fixed price” option to be active.

Can you help me with that?

Many thanks and greeting,

Joshua