updateMany shows syntax error when running from shell script

My shell script is :

#! /bin/sh
mongo --host << EOF
use data
db.agent.updateMany({},{$set: {“incoming”:-99}})

On executing this script I get the following error:

E QUERY [thread1] SyntaxError: invalid property id @(shell):1:32

The same commands when run individually on mongo shell execute successfully with the following output
{ “acknowledged” : true, “matchedCount” : 5, “modifiedCount” : 1 }

The shell /bin/sh probably tries to expand $set as a shell variable.

Try to put it inside single quotes.

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