| Name | Type | Description | Notes |
|---|---|---|---|
| messageId | String | ||
| userId | String | ||
| channelId | String | ||
| subchannelId | String | [optional] | |
| metadata | Map<String, String> | Community-channel message metadata to set. Keys support letters, digits, and `+ = - _`, with a maximum key length of 32 characters. Each request can set up to 20 entries. |