Using Mandrill SMTP integration

Question

I'm using Mandrill to send emails from my application (C#).

I'm using a template from Mailchimp and I have a merge tag |* NEWUSERCONTENT *|, to represent the email content.

The problem is that I send the content but I receive only the merge tag. My code:

email.Headers.Add("X-MC-Template", "template-1-novo-usuario");
email.Headers.Add("X-MC-MergeLanguage", "Mailchimp");
email.Headers.Add("X-MC-MergeVars", "{\"name\": \"newusercontent\", \"content\": \"teste\"}");

Instead of receiving "teste" on email content, I receive |* NEWUSERCONTENT *|.

I didn't find a clear example on Mandrill KB. Anyone knows how to resolve this?

EDIT:

It works, my merge tag was wrong.

But now I found another problem. The real text I want to pass has line break (\n), and in this case, the merge tag doesn't work. How can I resolve this?