| Field | Type | Description |
|---|---|---|
| message | String | A String value |
| sender | String | Optional. String enumarion of 'customer', 'company' |
| timestamp | DateTime | Optional. Date and time in YYYY-MM-DD HH:MM:SS format |
{
"message": "...",
"sender": "customer",
"timestamp": "2019-01-31 12:00:00"
}