How to sort a json file with key value pairs based on values?

I have the following kind of json:

const obj = {
  "trees":{
     "name":"a",
     "age":"9",
     "height":"10",
     "location":"park"
  },
  "cars":{
     "name":"b",
     "age":"3",
     "height":"10",
     "location":"park"
  },
  "bikes":{
     "name":"c",
     "age":"110",
     "height":"10",
     "location":"park"
  }
};

How do I sort it based on say age in javascript or react.