Task: Send an email template using Mandrill

n8n workflow JSON:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Mandrill","type":"n8n-nodes-base.mandrill","position":[450,300],"parameters":{"options":{},"toEmail":"user@example.com","template":"welcomeemailv2","fromEmail":"example@yourdomain.com"},"credentials":{"mandrillApi":"mandrill_creds"},"typeVersion":1}],"connections":{"On clicking 'execute'":{"main":[[{"node":"Mandrill","type":"main","index":0}]]}}}