| Name | Type | Description | Notes |
|---|---|---|---|
| type | String | An identifier for the channel from which a message originated. May include one of api, sdk, messenger, or any number of other channels. | |
| integrationId | String | Identifier indicating which integration the message was sent from. For user messages only. | [optional] |
| originalMessageId | String | Message identifier assigned by the originating channel. | [optional] |
| originalMessageTimestamp | String | A datetime string with the format `YYYY-MM-DDThh:mm:ss.SSSZ` representing when the third party channel received the message. | [optional] |
| client | Client | The client from which the user authored the message or activity, if applicable. This field is not applicable in API responses, it is used only in webhook payloads if the `includeFullSource` option is enabled. | [optional] |
| device | Device | The device from which the user authored the message or activity, if applicable. This field is not applicable in API responses, it is used only in webhook payloads if the `includeFullSource` option is enabled. | [optional] |