Update a Digital Link

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({digital_link: {access_counter: 0, line_item_id: '1', digital_id: '1'}})
};

fetch('http://{defaultHost}/api/v2/platform/digital_links/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "id": "8",
    "type": "digital_link",
    "attributes": {
      "token": "hv6VNk8yK2oiZRPsB1pQnazN",
      "access_counter": 0
    },
    "relationships": {
      "digital": {
        "data": {
          "id": "8",
          "type": "digital"
        }
      },
      "line_item": {
        "data": {
          "id": "16",
          "type": "line_item"
        }
      }
    }
  }
}