# Session ## Fields | Field | Type | Required | Description | | --------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------- | | `object` | [com.clerk.backend_api.models.components.SessionObject](../../models/components/SessionObject.md) | :heavy_check_mark: | String representing the object's type. Objects of the same type share the same value.
| | `id` | *String* | :heavy_check_mark: | N/A | | `userId` | *String* | :heavy_check_mark: | N/A | | `clientId` | *String* | :heavy_check_mark: | N/A | | `actor` | [JsonNullable](../../models/components/Actor.md) | :heavy_minus_sign: | N/A | | `status` | [com.clerk.backend_api.models.components.Status](../../models/components/Status.md) | :heavy_check_mark: | N/A | | `lastActiveOrganizationId` | *JsonNullable* | :heavy_minus_sign: | N/A | | `lastActiveAt` | *long* | :heavy_check_mark: | N/A | | `expireAt` | *long* | :heavy_check_mark: | N/A | | `abandonAt` | *long* | :heavy_check_mark: | N/A | | `updatedAt` | *long* | :heavy_check_mark: | Unix timestamp of last update.
| | `createdAt` | *long* | :heavy_check_mark: | Unix timestamp of creation.
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