curl --request GET \
  --url https://api.stack-auth.com/api/v1/internal/conversations/{conversationId}

{
  "conversation": {
    "conversationId": "<string>",
    "subject": "<string>",
    "lastActivityAt": "<string>",
    "metadata": {
      "tags": [
        "<string>"
      ],
      "assignedToUserId": "<string>",
      "assignedToDisplayName": "<string>",
      "firstResponseDueAt": "<string>",
      "firstResponseAt": "<string>",
      "nextResponseDueAt": "<string>",
      "lastCustomerReplyAt": "<string>",
      "lastAgentReplyAt": "<string>"
    },
    "userId": "<string>",
    "teamId": "<string>",
    "userDisplayName": "<string>",
    "userPrimaryEmail": "<string>",
    "userProfileImageUrl": "<string>",
    "preview": "<string>",
    "createdAt": "<string>",
    "updatedAt": "<string>",
    "lastMessageAt": "<string>",
    "lastInboundAt": "<string>",
    "lastOutboundAt": "<string>",
    "closedAt": "<string>",
    "recordMetadata": {}
  },
  "messages": [
    {
      "id": "<string>",
      "conversationId": "<string>",
      "subject": "<string>",
      "attachments": [
        {}
      ],
      "createdAt": "<string>",
      "sender": {
        "id": "<string>",
        "displayName": "<string>",
        "primaryEmail": "<string>"
      },
      "userId": "<string>",
      "teamId": "<string>",
      "body": "<string>",
      "metadata": {}
    }
  ],
  "entryPoints": [
    {
      "id": "<string>",
      "channelType": "<string>",
      "adapterKey": "<string>",
      "isEntryPoint": true,
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "externalChannelId": "<string>",
      "metadata": {}
    }
  ]
}