All optional.
| Name | Type | Description | Notes |
|---|---|---|---|
| displayText | String | Button label. Defaults to "Call Now". | [optional] |
| ttlMinutes | Integer | How long the button stays tappable. Defaults to 10080 (7 days). | [optional] |
| payload | String | Arbitrary string echoed back as `cta_payload` on the `calls` webhook (connect/terminate) for attribution. | [optional] |