Convert array into custom object with array items as key values

I'm kinda new to JS so I kinda got stuck with this what it seemed simple problem. I have to convert payload from:

const payload = {left: ['name', 'phone'], right: ['address']} 

to:

const payload = 
  columns: {
      name: {
        pinned: 'left',
      },
      phone: {
        pinned: 'left',
      },
      address: {
        pinned: 'right'
     }
    },

So far i came up with something like this:

const left = pinnedColumns.left.map((col) => ({ [col]: { pinned: 'left' } }));

But it creates an array with index as a key.

You can do this pretty cleanly with a for and forEach loop:

const payload = {
  left: ['name', 'phone'],
  right: ['address']
}

const result = {columns: {}};
for(const [key, val] of Object.entries(payload)) {
  val.forEach(v => {
    result.columns[v] = {pinned: key};
  });
}
console.log(result);