How to add a new value to the map?

Question

I am working on the React app, and there I have an array shopsAsArray. This array looks like this:

[
    {
       "shopName":"Billa",
       "ID":"01",
       "ratings":[
          {
             "stars":5,
             "comment":"Good assortiment."
          },
          {
             "stars":5,
             "comment":"Very Tasty Food!"
          }
       ]
    },
    {
       "shopName":"Albert",
       "ID":"02",
       "ratings":[
          {
             "stars":5,
             "comment":"Nice"
          },
          {
             "stars":4,
             "comment":"Not bad"
          }
       ]
    }
]

I need to add a new comment to one of these shops. This shop is the same as variable chosenShop. So my task is to add a new comment to the shop that has the same ID as chosenShop. I know that the next function is wrong, but I don’t know how to fix it:

shopsAsArray.get(chosenShop.ID).push(newComment);