sandbox/app/views/admin/components/miscellaneous/modal_post.html.erb
<% content_for(:title, "Modal POST") %>
<% toolbar(:primary) do |t| %>
<%= t.button "Dismiss", style: :success, data: { action: "modal#hide" } %>
<% end %>
<%= render layout: "modal" do %>
<p>Modal POST response.</p>
<% end %>