Support for Product Advertising API Signing Version 2.
  -- Refactor to try and leverage original author's type classes. (for now)

BrowseNodeLookup call.
  -- Only parses child nodes.
  -- TBD Parse ancestor nodes in response.
BrowseNodeLookup call.
 -- Parsing only for BrowseNodeInfo report group.
 -- And then only parses child browse nodes (ancestors are ignored).