curl -X POST https://api.livchat.ai/v1/messages/send/contact \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"phone": "5511999999999",
"name": "John Doe",
"vcard": "BEGIN:VCARD\nVERSION:3.0\nN:Doe;John;;;\nFN:John Doe\nTEL;type=CELL:+1 555 123 4567\nEND:VCARD"
}'