text: exports.handler = function(event, context, callback) {
      const tokenId = event.queryStringParameters.tokenId
      const metadata = {
          "name": "Token #" + tokenId,
          "description": "Describes the asset to which this token represents",
          "image": "https://dummyimage.com/600x400/000000/fff/&text=token%20" + tokenId,
      }
      
      callback(null, {
          statusCode: 200,
          body: JSON.stringify(metadata)
      });
  };