My Discord app is using all my memory. What am I doing wrong?

// Program.cs
using D6.Api.Commands;
using D6.Api.Discord;
using Microsoft.AspNetCore.Mvc;
using System.Text.Json;
using System.Text.Json.Nodes;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSingleton<DiscordHelper>();

var app = builder.Build();

app.MapPost("/", async (HttpContext ctx,
                [FromHeader(Name = "X-Signature-Ed25519")] string sig,
                [FromHeader(Name = "X-Signature-Timestamp")] string timestamp,
                [FromServices] DiscordHelper DiscordHelper) =>
{

    using StreamReader reader = new(ctx.Request.Body);
    string body = await reader.ReadToEndAsync();
    JsonDocument jsonBody = JsonDocument.Parse(body);
    JsonElement interaction = jsonBody.RootElement.Clone();
    jsonBody.Dispose();

    bool is_verified = DiscordHelper.VerifySignature(body, timestamp, sig);

    if (!is_verified)
    {
        return Results.Unauthorized();
    }

    int interaction_type = interaction.GetProperty("type").GetInt32();

    if (interaction_type == 1)
    {
        return Results.Ok(new JsonObject
        {
            ["type"] = 1
        });
    }

    string CommandName = interaction.GetProperty("data").GetProperty("name").GetString()!;

    JsonObject JsonReply = CommandName switch
    {
        "d6" => Commands.D6(interaction),
        _ => new JsonObject()
    };

    return Results.Ok(JsonReply);
});

app.Run();