# CampaignContactCreate

> The CampaignContactCreate object.

| Field | Type | Description |
|---|---|---|
| `external_id` | string or null |  |
| `metadata` | object | Your own data, carried onto every conversation with this person. The agent never sees it. |
| `timezone` | string or null | Where this person is, like `America/Chicago`: the calling hours are read there. Leave it out for your organization's own time zone. |
| `to_number` | string | The number to call, in international format. |
| `variables` | object | This person's values for the agent's `{{placeholders}}`. |