A button of an approved template (Unicom360.WhatsApp.TemplateInfo): index, type
("url", "quick_reply", "otp", ...; open), and text, url and otp_type when the
type has them.
A button of an approved template (Unicom360.WhatsApp.TemplateInfo): index, type
("url", "quick_reply", "otp", ...; open), and text, url and otp_type when the
type has them.