How to decrypt access_token inside a .net core app

Question

The authentication server is a .net framework app which generates a token using the machineKey here is the snipet

    public async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
{

        var userAuthResult = Authentication.AuthenticateUser(context.UserName, context.Password, ref userId);
        if (userAuthResult != AuthenticateUserResult.Success)
        {
            context.SetError("invalid_grant", "Unable to Authorize");
            return;
        }

    var claims = new List<Claim>
    {
        new Claim(ClaimTypes.Name, UserName),
        new Claim("DisplayName", FirstName),
    };

    var oAuthIdentity = new ClaimsIdentity(claims, context.Options.AuthenticationType);         

    AuthenticationProperties properties = CreateProperties(context.ClientId);
    var ticket = new AuthenticationTicket(oAuthIdentity, properties);
    context.Validated(ticket);
}

There is another .net core application (API) which I working on right now. The user passes the access_token which gets from authentication server via authorization header. What I am trying to do is look for a way to decrypt the token to see the claims. I was wondering if there is a library which I can pass in the token and machineKey to decrypt it or any other way?