| Name | Type | Description | Notes |
|---|---|---|---|
| attribute | string | A built-in contact attribute, or `cf:{fieldUuid}` to target a custom contact field. Custom fields are addressed by field UUID; their slug is not accepted. Built-in attributes: `email`, `note`, `domain`, `source`, `opt_in_method`, `subscription_status`, `subscribed_at`, `unsubscribed_at`, `created_at`, `tag`, `campaigns`, `processed`, `opened`, `clicked`, `delivered`, `bounced`, `soft_bounced`, `dropped`. Which operators are accepted depends on the attribute. | |
| operator | string | ||
| value | string | Always a string, including for numeric and date comparisons |