Javascript: Filter object returns the right values but with the wrong structure

I have an object that I would like to filter and only return the objects where salesPersonID = "1"

var jsonData = {"a": {"id": "a","name": "Lucifer Enterprises","salesPersonId": "1"    },"b": {"id": "b","name": "Charlies Chocolate Factory","salesPersonId": "1"    },"c": {"id": "c","name": "Geckos Investments","salesPersonId": "2"    }};

Expected output:

var jsonDataFiltered = {"a": {"id": "a","name": "Lucifer Enterprises","salesPersonId": "1"    },"b": {"id": "b","name": "Charlies Chocolate Factory","salesPersonId": "1"    }};

What I have tried

1. Using filter directly on the object which results in Uncaught TypeError: jsonData.filter is not a function

      var filteredJsonData = jsonData.filter(function (row){        console.log("test");      });

2. Using Object entries and filter which returns a and b but with a different structure that will be an issue for what I am using the object for down the line.

      var filteredJsonData = Object.entries(jsonData).filter(function (entry){        return entry[1].salesPersonId == "1";      });

Output from test 2 which has the right values but the wrong structure:

[    [ "a", { "id": "a", "name": "Lucifer Enterprises", "salesPersonId": "1" } ],    [ "b", { "id": "b", "name": "Charlies Chocolate Factory", "salesPersonId": "1" } ] ]

The question

How can I get the desired output?