ApichatWebhookDialogMessage

buttons
Type: array of string
required

Labels; parallel-indexed with payloads.
payloads
Type: array of string
required

Send the chosen payload back via POST /send/ with the matching button label. (No urls/attachments/rich_text on APIchat.)
timestamp
Type: number
required

Unix epoch seconds with fractional microseconds (e.g. 1780054017.039184). Not a string, not milliseconds.
title
Type: string
required

Dialog prompt.
type
enum
const:
dialog
required