## User Key

- **string**: The user ID to read. Can also come from the UserDB `azk` cookie.

## Group

- **integer**: required  
  Min: 1, Max: 100, nullable. Send 1–100 to set the group, or null to clear it.

## Response Structure

### HTTP Status Code

```json
200
```

### Example Request

```shell
curl --request POST \
     --url https://e-networkid.adzerk.net/udb/networkId/group \
     --header 'accept: application/json' \
     --header 'content-type: application/json'
```

### Example Payload

```json
{
  "key": "ue1-e397eb5990",
  "group": 42
}
```