const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    description: 'Head Office',
    first_line: '4050 Jefferson Plaza, 41st Floor',
    city: 'New York',
    postal_code: '10021',
    region: 'NY',
    country_code: 'US'
  })
};

fetch('https://api.paddle.com/customers/{customer_id}/addresses', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "id": "add_01hv8gq3318ktkfengj2r75gfx",
    "status": "active",
    "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
    "description": "Head Office",
    "first_line": "4050 Jefferson Plaza, 41st Floor",
    "second_line": null,
    "city": "New York",
    "postal_code": "10021",
    "region": "NY",
    "country_code": "US",
    "custom_data": null,
    "created_at": "2024-04-12T06:42:58.785Z",
    "updated_at": "2024-04-12T06:42:58.785Z",
    "import_meta": null
  },
  "meta": {
    "request_id": "dd6bbb71-6551-4e4a-843c-b10611cddb6e"
  }
}