Add project files.

SendPrintJob/Program.cs

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+using Microsoft.AspNetCore.SignalR.Client;
+using Microsoft.Extensions.Logging;
+using System.Reflection;
+using System.Text.Json.Serialization;
+
+var url = "wss://api.dev.gastrojames.ch/hubs/internal";
+var accessToken = url; // or your actual token
+
+var connection = new HubConnectionBuilder()
+    .WithUrl(url, options =>
+    {
+        options.AccessTokenProvider = () => Task.FromResult<string?>(accessToken);
+        options.SkipNegotiation = true;
+        options.Transports = Microsoft.AspNetCore.Http.Connections.HttpTransportType.WebSockets;
+    })
+    .WithAutomaticReconnect()
+    .Build();
+
+connection.On<PrintJob>("PrintJob", (args) =>
+{
+    Console.WriteLine($"Received print job for working area: {args.WorkingAreaId}");
+
+
+});
+
+await connection.StartAsync();
+
+Console.ReadLine();
+
+public class PrintJob
+{
+    [JsonPropertyName("workingAreaId")]
+    public string WorkingAreaId { get; set; }
+    [JsonPropertyName("content")]
+    public string Content { get; set; }
+}

SendPrintJob/SendPrintJob.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="10.0.0" />
+  </ItemGroup>
+
+</Project>