WordPress: wp_localize_script with a stdClass

wp-localize-test-data.php

$test_data = array();
$test_data[] = new stdClass();
$test_data[0]->field1 = 'hello';
$test_data[0]->field2 = 'world';
$test_data[0]->my_object = new stdClass();
$test_data[0]->my_object->field3 = 'more hello world';

wp_localize_script( 'gmec-intranet', 'test_data', $test_data );
  
// outputs the following Javascript
// var test_data = [{"field1":"hello","field2":"world","my_object":{"field3":"more hello world"}}];
  
// console screenshot:  http://i.imgur.com/lhyhOPw.png