Uses 'pick' to explicitly select the properties we want to keep, as opposed to throwing away the ones we don't.

PickAsAlternativeToOmit.ts

const objectFromFrontend = {
  _id: 5,
  data: {
    some: 1,
    useful: 2,
    data: 3
  }
}

const objectToInsertIntoDB = _.pick(objectFromFrontend, ['data.useful', 'data.data']);

console.log(objectToInsertIntoDB)
/**
* {
*   data: {
*    useful: 2,
*    data: 3
*  }
* }
*/

console.log(objectFromFrontend)
/**
* {
*   _id: 5,
*   data: {
*    some: 1,
*    useful: 2,
*    data: 3
*  }
* }
*/