const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    description: 'California Office',
    first_line: '5400 E Washington Drive, Floor 2',
    city: 'San Jose',
    region: 'CA',
    custom_data: {crm_id: '08bcfb7a-41d8-4747-9ade-3d885c287d0f'}
  })
};

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

{
  "data": {
    "id": "add_01hv8gwdfkw5z6d1yy6pa3xyrz",
    "status": "active",
    "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
    "description": "California Office",
    "first_line": "5400 E Washington Drive, Floor 2",
    "second_line": null,
    "city": "San Jose",
    "postal_code": "95314",
    "region": "CA",
    "country_code": "US",
    "custom_data": {
      "crm_id": "08bcfb7a-41d8-4747-9ade-3d885c287d0f"
    },
    "created_at": "2024-04-12T06:45:53.267Z",
    "updated_at": "2024-04-12T06:47:01.533006Z",
    "import_meta": null
  },
  "meta": {
    "request_id": "c3308aa6-fdba-457d-af96-6a51e7292b90"
  }
}