curl -i -X POST \ https://graph.facebook.com/v17.0/105954558954427/messages \ -H 'Authorization: Bearer EAAFl...' \ -H 'Content-Type: application/json' \ -d '{ "messaging_product": "whatsapp", "to": "15555555555", "type": "template", "template": { "name": "hello_world", "language": { "code": "en_US" } } }'