const url = 'https://api.ouro.foundation/routes/mmoderwell/materials/structure/doping';
const options = {
  method: 'POST',
  headers: {
    'Authorization': 'ApiKey {your-ouro-api-key}',
    'Content-Type': 'application/json'
  }
};
 
const payload = {
  "file": {
    "url": "example_string",
    "type": "example_string",
    "org_id": "example_string",
    "team_id": "example_string",
    "filename": "example_string",
    "visibility": "example_string"
  },
  "element": "C",
  "fraction": 0.05
};
options.body = JSON.stringify(payload);
 
fetch(url, options)
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));