my $req = HTTP::Request->new;
my $ua = LWP::UserAgent->new;
my %json;
$json{apple} = "foo";
$json{kiwi} = "bar";
my $oauth = Net::OAuth->request('protected resource')->new(
    consumer_key     => "...",
    consumer_secret  => "......",
    token            => ".....",
    token_secret     => ".....",
    protocol_version => Net::OAuth::PROTOCOL_VERSION_1_0A,
    signature_method => "HMAC-SHA1",
    timestamp        => time,
    nonce            => int( rand( 2**32 ) ),
    request_url      => ".....",
    request_method   => "POST"
);

$oauth->sign;

$req->header('Authorization'=>$oauth->to_authorization_header.',realm="account"');
    $req->content_type('application/json');
    $req->header('accept' => 'application/json');
    $req->method($oauth->request_method);
    $req->uri($oauth->request_url);
    $req->content(encode_json(\%json));
    
$ua->agent('Mozilla/8.0');

my $response=$ua->request($req);