JSON Transformer's merge patch option should do the trick, though you need to have one of the JSONs as a constant string, or as a flow variable. In case both are in a table with multiple rows, you will have to Chunk Loop Start (1-by-1) and use the Table Row to Variable nodes ending with a Loop End node.
Thanks thor and aborg. I was able to transform my JSON string as described in my original post using the JSON Merge/Transform node. Now I cannot seem to figure out what to do with it. I tried to atttach the transformer node to a POST node; however, the POST node does not seem to recognize the column containing the JSON data. Using a Column Rename to change the column type to String has no effect. Passing the Transformer output through a "Create REST Representation" nodes adds a column name as an outer value and adds carriage returns and new lines which is not what I want. Any ideas? Thanks.