MongoDB adding ObjectId to array of IDs

I have Poems schema which has a linked array of ObjectIds under field name ‘communities’:

    { _id: ObjectId("61659ef70e87b90018f7baa1"),
  schemaName: 'Poem',
  helps: [ ObjectId("5d15c609832d390c41ab6872") ],
  communities: 
   [ ObjectId("5eafbabaf0be6f0017303eb3"),
     ObjectId("5eba549a45bd9300170f6311") ],

I am trying to add a new ObjectId to the array using updateOne and $push:

    db.poems.updateOne(
  {title: "My stillness"},
  {$push: {communities: {ObjectId: ('61f942b737bdc10018722539')}}}
  )

While the new Id gets added, it is not in the correct format (see also attached image from MongoDB Compass for further clarity on the difference in format). How can I adjust my updateOne/$push method to add the ObjectId in the correct format? Thanks

    { _id: ObjectId("61659ef70e87b90018f7baa1"),
  schemaName: 'Poem',
  helps: [ ObjectId("5d15c609832d390c41ab6872") ],
  communities: 
   [ ObjectId("5eafbabaf0be6f0017303eb3"),
     ObjectId("5eba549a45bd9300170f6311"),
     { ObjectId: '61f942b737bdc10018722539' } ],

>Solution :

You are pushing key-value pair into the array.

ObjectId: ('61f942b737bdc10018722539')

Instead, it should be:

ObjectId('61f942b737bdc10018722539')

db.poems.updateOne(
  { title: "My stillness" },
  { $push: { communities: ObjectId('61f942b737bdc10018722539') } }
)

Sample Mongo Playground