Invalid JSON response to POST /user/queries

[heralden]

The POST /user/queries endpoint for saving queries to a user's profile, returns an invalid JSON response, visible when the format parameter is set to json.

http://iodocs.apps.intermine.org/flymine/docs#/ws-saved-queries/POST/user/queries

Here's an example response:

{"queries":{
"unnamed_query":"unnamed_query_3"
},,"executionTime":"2020.02.05 09:59::54","wasSuccessful":true,"error":null,"statusCode":200}

There are two commas after the queries object, which causes an error when parsing the response.