Add E-Signatures to Laravel

// app/Http/Controllers/ContractController.php
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;

class ContractController extends Controller
{
    public function send(Request $request)
    {
        $response = Http::withHeaders([
            'Authorization' => 'Bearer ' . env('SIGNBEE_API_KEY'),
        ])->post('https://signb.ee/api/send', [
            'content' => $request->content,
            'senderName' => $request->sender_name,
            'senderEmail' => $request->sender_email,
            'recipientName' => $request->recipient_name,
            'recipientEmail' => $request->recipient_email,
        ]);

        return $response->json();
    }
}