| Name | Type | Description | Notes |
|---|---|---|---|
| field | string | Required. Name of the field to use as the first operand in the filter expression. | [optional] |
| key | string | If `field` is `tag`, this field is required to specify `key` inside the tags. | [optional] |
| value | string | Constant value to use as the second operand in the filter expression. This value is required when the relation operator is a binary operator. | [optional] |
| hours_ago | string | If `field` is session-related, this is required to specify the number of hours before or after the user's session. | [optional] |
| radius | float | If `field` is `location`, this will specify the radius in meters from a provided location point. Use with `lat` and `long`. | [optional] |
| lat | float | If `field` is `location`, this is required to specify the user's latitude. | [optional] |
| long | float | If `field` is `location`, this is required to specify the user's longitude. | [optional] |
| relation | string | Required. Operator of a filter expression. | [optional] |