Push an array inside a array and after update array and save to database - angular

[natashanodine]

I want to push an array comment in to cabin.comments array and after UPDATE of the cabin array with the new comment in it when the user submits a comment using the onSubmit() and update the cabin with the updateCabin.
In the console when running "ng serve --open" I am getting an error:

error TS1128: Declaration or statement expect

I am using a JSON database in the main folder.
I am really new to angular and I am lost.

This is my component file with my onSubmit

  onSubmit(id) {
	  
		this.cabin.comments.push(this.comment);
	 this.cabinService.updatePosts(this.cabin.id);
  	  
	this.commentForm.reset({
		author: '',
		rating: 5,
		comment: ''
	});
  }

My cabinService

 updatePosts(id){
 const data={"cabin": "Cabin"};
 return this.http.get<{cabin: Cabin}>('http://localhost:3000/cabins/'+id).pipe(
  map(cabin=>{
	console.log(cabin);


	 return{
		   description: cabin.description,
		   featured: cabin.featured,
		   comments: cabin.comments

		 };


	 })
	).subscribe(updatedEntries=>{
			console.log(updatedEntries);

	  updatedEntries.comments.push(data);
	  return this.http.put('http://localhost:3000/cabins/' +id, updatedEntries);

	console.log(updatedEntries);

});

My JSON database

	  "cabins": [
		{
		  "id": 0,
		  "description": "Tucked away on the hillside among lush gardens of banana & citrus trees",
		  "featured": "true",
		  "comments": [
			{
			  "rating": 5,
			  "comment": "Beautiful place!",
			  "author": "John Gomez",
			  "date": "2018-10-16T17:57:28.556094Z"
			},
			{
			  "rating": 4,
			  "comment": "Amazing!",
			  "author": "Paul Villar",
			  "date": "2017-09-05T17:57:28.556094Z"
			}
		  ]
		}
      ]