Run mongodb command on qt

I use the following to run the command and I got that output. But I dun know why it is not correct and how can I change the Command to run successfully? Thank you.

Code:

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FILE *fileProcess = popen(command.c_str(), "r");

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Quote:

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mongoexport --host 192.168.2.10:27036 --db clement --collection hallo --out /home/clement/hallo.json --type json --query "{"_id" : { $lte : 1 }}" --limit 0 --skip 0 2>&1

2018-08-23T15:41:41.477+0800 error validating settings: query '[123 34 95 105 100 34 32 58 32 123 32 32 58 32 49 32 125 125]' is not valid JSON: invalid character ':' looking for beginning of object key string
2018-08-23T15:41:41.477+0800 try 'mongoexport --help' for more information

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