Add E-Signatures to Next.js

// app/actions/send-contract.ts
"use server";

export async function sendContract(formData: FormData) {
  const res = await fetch("https://signb.ee/api/send", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.SIGNBEE_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      content: formData.get("content"),
      senderName: formData.get("senderName"),
      senderEmail: formData.get("senderEmail"),
      recipientName: formData.get("recipientName"),
      recipientEmail: formData.get("recipientEmail"),
    }),
  });
  return res.json();
}