lodash-merge.es6

const _ = require('lodash');

const obj1 = { entities: { jobs: { 1: 1 }, source: 'obj1' } };
const obj2 = { entities: { jobs: { 1: 3 } }};

const merge = { ...obj1, ...obj2};
merge

const mergeWithLodash = _.merge({}, obj1, obj2);
mergeWithLodash