conversation

{
    "id": 0,
    "messages": [
        {
            "content": "string",
            "content_type": "text",
            "content_attributes": {},
            "message_type": "incoming",
            "created_at": 0,
            "private": true,
            "attachment": {},
            "sender": {},
            "conversation_id": 0
        }
    ],
    "account_id": 0,
    "inbox_id": 0,
    "status": "open",
    "timestamp": "string",
    "contact_last_seen_at": "string",
    "agent_last_seen_at": "string",
    "unread_count": 0,
    "additional_attributes": {},
    "custom_attributes": {
        "attribute_key": "attribute_value",
        "priority_conversation_number": 3
    }
}