> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/UploadUserDataRequest).

Request message for `UserDataService.UploadUserData`

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/services/user_data_service.proto)

| Fields ||
|---|---|
| ## `customer_id` | `string` Required. The ID of the customer for which to update the user data. |
| ## `metadata` Union field. Metadata of the request. `metadata` can be only one of the following: ||
| ### `customer_match_user_list_metadata` | `CustomerMatchUserListMetadata` Metadata for data updates to a Customer Match user list. |
| ## `operations[]` | `UserDataOperation` Required. The list of operations to be done. |