const dataBlockId = '22222222';

const response = await fetch(`https://service.pcibooking.net/api/dataBlock/${dataBlockId}`, {
  method: 'PUT',
  headers: {
    'Authorization': 'APIKEY your-api-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    Reference: 'updated_ref_001',
    DataBlockLocation: 'US'
  })
});

const data = await response.json();
console.log(data);

import requests

data_block_id = '22222222'

response = requests.put(
    f'https://service.pcibooking.net/api/dataBlock/{data_block_id}',
    headers={
        'Authorization': 'APIKEY your-api-key',
        'Content-Type': 'application/json'
    },
    json={
        'Reference': 'updated_ref_001',
        'DataBlockLocation': 'US'
    }
)

print(response.json())

{
    "UserId": "Nadya",
    "OwnerId": "Frodo",
    "Id": "22222222",
    "Reference": "my reference",
    "ContentType": null,
    "DataSize": null,
    "CreationTime": "2019-01-16T11:21:25.3241104Z",
    "LastAccessedTime": null,
    "LastModifiedTime": null,
    "DataBlockLocation": "DE"
}

{
    "code": -125,
    "message": "Bad input data",
    "moreInfo": "...",
    "errorList": null
}

{
    "code": -1003,
    "message": "Not authorized to access this resource",
    "moreInfo": "Bad or missing authorization data, expected APIKEY",
    "errorList": null
}