Postman pre-request script convert body to base64 - Commercetools

convert-body-to-base64.js

//  Convert part of the body to base64 (same format as messages)
 var data = JSON.parse(pm.request.body.raw);

 const newBody = {
     ...data,
     message: {
         data: Buffer.from(JSON.stringify(data.message.data)).toString('base64'),
     }
 };

 let body = {
     mode: 'raw',
     raw: JSON.stringify(newBody),
     options: {
         raw: {
             language: 'json'
         }
     }
 }

 pm.request.body.update(body);