Rendering Object from Jinja within ActionChain

Attempting to do this:

- name: "lookup_netbox_role"
    ref: "netbox.ipam_get_roles"
    publish:
      role_my_block: "{{ lookup_netbox_role.result.raw.results | selectattr('slug', 'equalto', 'platform_my_block') | list | first }}"
      role_my_other_block: "{{ lookup_netbox_role.result.raw.results | selectattr('slug', 'equalto', 'platform_my_other_block') | list | first }}"
    on-success: "assign_superblock"

The Jinja2 expression filters down the result of my action to something like this: {'id': 10, 'name': 'Platform_My_Block', 'weight': 1000, 'slug': 'platform_my_block'} however this is published as a string.

Further into my chain I attempt to access the id with {{ role_my_block.id }} and I'm told "Failed to run task \"assign_superblock\". Parameter rendering failed.. Failed rendering value for action parameter \"role\" in task \"assign_superblock\" (template string={{ role_my_block.id }}): 'unicode object' has no attribute 'id'"

Start with the ActionChain YAML example and trace how the Jinja expression in the publish section is rendered. Reproduce the chain where the filtered object becomes a string, then verify that a later expression such as {{ role_my_block.id }} can access the published object's id without the rendering failure.