How could I extract this variable from a JavaScript string using regex?

I’m trying to extract the value of this variable which is in a string along with other Javascript. Any help to get beyond where I’m at would be very helpful!

  const someObject = {
    name: 'About Us',
     objectProp: [{
        type: 'text',
        default: {
            value: 'Hey there'
     permissions: [],
     position: 'relative',
     breakpoints: [],
     slots: [],

This gets me close but terminates at the first } under value: 'Hey there'