const form = new FormData();
form.append('prompt', '<string>');
form.append('data', '<string>');
form.append('reference_image.0', '{
  "fileName": "example-file"
}');

const options = {method: 'POST', headers: {'x-api-key': '<api-key>'}};

options.body = form;

fetch('https://api.decart.ai/v1/generate/lucy-image-latest', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

"<string>"