| Name | Description | Type | Additional information |
|---|---|---|---|
| type | string |
None. |
|
| replyToken | string |
None. |
|
| source | User |
None. |
|
| timestamp | integer |
None. |
|
| mode | string |
None. |
|
| message | Message |
None. |
|
| postback | PostbackAction |
None. |