| Name | Type | Description | Notes |
|---|---|---|---|
| account_sid | Option<String> | Account SID. | [optional] |
| call_sid | Option<String> | Call SID. | [optional] |
| sid | Option<String> | User Defined Message SID. | [optional] |
| date_created | Option<String> | The date this User Defined Message was created. | [optional] |