def normalized_request_params
      query_params + protocol_params.reject { |k,v| %w(realm oauth_signature).include?(k) }.to_a + entity_params
    end
def normalized_request_params
      query_params + protocol_params.reject { |k,v| %w(realm oauth_signature).include?(k) }.to_a + entity_params
    end
section 3.4.1.3

 @return [Array<Array<String> (size 2)>]