Enviar datos por mandrill con Plantilla o un texto HTML

mandrill.php

<?
	require 'vendor/autoload.php';

	$mandrill = new Mandrill(API_KEY_MANDRILL);

	$message = [
		'from_email' => 'info@digitalmeat.cl',
		'from_name' => 'Digital Meat',
		'subject' => 'My Subject Subject',
		'preserve_recipients' => FALSE,
		'to' => [
    		[
    			'email' => 'shidalgo@digitalmeat.cl',
    			'name' => 'sergio',
    			'type' => 'to'
    		]
	    ]
	];

	# Message HTML:
	//$message['html'] = 'my text';
	//$mandrill->messages->send($message);

	# Message Template: (in HTML template: *|NAME|*  *|LASTNAME|*)
	$vars_for_template = [
		'name' => 'Sergio',
		'lastname' => 'Hidalgo'
	];
	
	foreach($vars_for_template as $key => $value):
		// No modificar variables !
		$message["global_merge_vars"][] = [
			'name' => $key,
			'content' => $value
		];
	endforeach;

	$mandrill->messages->sendTemplate('template-test', [] ,$message);