Postback Event

This event object is received as a response for the postback action of an action object.
It can be used when the following messages are sent, where an event object whose type property is "postback" is sent.

Carousel messages
Image carousel messages
Message rich menus

Request {#postback-event-request}

Parameter	Type	Required	Description
type	string	Y	Set this parameter to "postback".
source	object	Y	The subject that sent a callback message.
source.userId	string	Y	The default account of the user who talked with the message bot.
source.channelId	string	Y	The message room ID to which the user belongs.
source.domainId	number	Y	The domain ID to which the user belongs.
issuedTime	string	Y	The date and time when the event occurred (format: YYYY-MM-DDThh:mm:ss.SSSZ).
data	string	Y	Postback data

Request example {#postback-event-request-example}

POST /callback HTTP/1.1Host: YOUR_SERVER_HOST_NAMEContent-type: application/json; charset=UTF-8X-WORKS-Signature: 9crxWhZ9aQO/9ruUM4MH3dF/WRGYRhj0vSR4cRyJfHQ=X-WORKS-BotId: 123{  "type": "postback",  "source": {    "userId": "c72af563-0f21-4736-11e4-045237113344",    "channelId": "12345",    "domainId": 40029600  },  "issuedTime":"2022-01-04T05:16:05.716Z",  "data": "action=buy"}

Response (customer's server receiving messages -> message server) {#postback-event-response}

It should return HTTP status 200 if successful.
The HTTP request sent by a callback is not resent even if it failed.

Response {#postback-event-response-example}

HTTP/1.1 200 OKContent-Type: application/jsonServer: YOUR_SERVER_HOST_NAMEContent-Length: 0