| Name | Type | Description | Notes |
|---|---|---|---|
| type | string | The following types are supported audio/amr audio/aac audio/mp3 audio/mpeg3 audio/mpeg audio/mpg audio/wav audio/3gpp audio/mp4 image/gif image/jpeg image/jpg image/png image/bmp video/mpeg4 video/mp4 video/mpeg video/3gpp video/3gp video/h263 text/plain text/x-vCard text/x-vCalendar" | |
| filename | string | The file name to be associated with the content. Some devices will display this file name with a placeholder for the content. | |
| payload | string |