Load JSON parameters for the Nodes#create action

When creating a new node (no :id has been sent), try to load the node parameters
from JSON as we already did in the Nodes#update action

app/controllers/nodes_controller.rb

@@ -47,7 +47,7 @@ def find_or_initialize_node
           render_optional_error_file :not_found
         end
       else
-        @node = Node.new(params[:node])
+        @node = Node.new(params[:node] || ActiveSupport::JSON.decode(params[:data]))
       end
     end