| Name | Type | Description | Notes |
|---|---|---|---|
| type | TypeEnum | Button type. phone is Facebook only. | |
| title | String | Button label (max 20 chars) | |
| url | String | URL for url-type buttons | [optional] |
| payload | String | Payload for postback-type buttons | [optional] |
| phone | String | Phone number for phone-type buttons (Facebook only) | [optional] |
| Name | Value |
|---|---|
| URL | "url" |
| POSTBACK | "postback" |
| PHONE | "phone" |