example.js

/*
PARSE SHOPIFY SECTION
*/

const regex = /(?<=application\/json">\n?)({|\[)([\s\S]+?)(?=<\/)/g

m.request({
  url: '/?section_id=1564432230347',
  extract: function (xhr) {

    return {
      status: xhr.status,
      body: xhr.responseText
    }

  }
})
.then(function (response) {

  const match = response.body.match(regex)
  console.log(JSON.parse(match[0]))

}).catch(e => console.log(e))