How to work with array of objects

I have a problem working with arrays, If I use a simple demo I can easily use them but as soon as I get into a more complex object I stuck for hours without to find the way out…

I attach a blueprint with one random test

blueprint.json (13.8 KB)

What I need is to send the array with all the details for each scene, as you can see I tried using “toArray” but it wont work, the result I get is this:

{"scenes": [Collection], [Collection], [Collection], [Collection]}

how to do it?

Thank you for help!!!