Howto add a collection banner to a product page template in Dawn template?

[brucecrock]

I have successfully added a block to one of my product template json files.

"banner": {
"type": "main-collection-banner",
"settings": {
"show_collection_description": true,
"show_collection_image": false,
"color_scheme": "background-1"
}
}
},
"order": [
"main",
"related-products",
"featured_collection_3mYRDQ",
"banner"
]
}

When I view the page in the editor, I can see the block is added to the template.  but there is nothing rendering inside the block.

It seems to be missing the collection object. I can't understand how that is referenced and populated differently in the collections.json... I tried to add a parameter to the banner block but that didn't work (ie. "collection":"flexies",)