Steps to reproduce:

1. In the aggregations app of compass, click on the 'down-arrow' right to the "+" sign, to open the dropdown-menu and then choose 'New Pipeline from text'. 
2. Paste the following Text:

   [ {"$project": {"_id": NumberInt("1")}} ]

Current Result:

A new pipeline is created with the following conent:

{
_id: NumberInt

Unknown macro: {'[object Object]') }

Below the step, the following error Message is displayed:

"Expected "[" or AggregationStage but "{" found."

Expected result:

The new pipeline should have the following content:

Unknown macro: { _id}