| Name | Type | Description | Notes |
|---|---|---|---|
| type | str | The type of message. | [default to 'image'] |
| media_url | str | The URL for media, such as an image, attached to the message. | |
| media_type | str | The type of media. | [optional] [readonly] |
| media_size | float | The size of the media in bytes. | [optional] [readonly] |
| alt_text | str | An optional description of the image for accessibility purposes. The field will be saved by default with the file name as the value. | [optional] |
| text | str | The text content of the message. Optional only if actions are provided. | [optional] |
| actions | list[Action] | Array of message actions. | [optional] |