agent_id is set, the messages can be pulled via GET /chats/context{
"id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
"agent_id": "2b1e3b65-2c04-4fa2-a2d7-467901e98978",
"contact_id": "+31612345678",
"channel": "whatsapp",
"role": "user",
"content": "string",
"metadata": {
"provider_message_id": "wamid.ABC",
"attachments": []
},
"created_at": "2019-08-24T14:15:22.123Z"
}