code: def update(attributes = {})
        assert_valid_keys(attributes, :id)
  
        # Update id
        id = attributes.delete(:id)
        update_id(id) if id
  
        true
      end
docs: Updates this playlist's information.
  
   @param [Hash] attributes The attributes to update
   @option attributes [String] :id
   @return [true]
   @raise [ArgumentError] if an invalid attribute or value is specified
   @raise [Turntabler::Error] if the command fails
   @example
     playlist.update(:id => "rock")  # => true