from fulcrum import Fulcrum
fulcrum = Fulcrum('{token}')

signature = fulcrum.signatures.media('{id}', 'thumbnail')

with open('{id}.jpg', 'wb') as f:
  f.write(signature)

const { Client } = require('fulcrum-app');
const client = new Client('{token}');

const fs = require('fs');
const writeStream = fs.createWriteStream('{id}.jpg');

client.signatures.media('{id}', 'thumbnail')
  .then(signature => signature.pipe(writeStream))
  .catch(error => console.log(error));

require 'fulcrum'

client = Fulcrum::Client.new('{token}')

client.signatures.thumbnail('{id}') do |input|
  File.open('{id}.jpg', 'wb') do |output|
    output.write(input.read)
  end
end