Trying to POST to doctype getting update error

ERPNext
1

Below Update error getting while doing a POST

this.authConfig.connect(function(){
                request.post({
                    url: "http://localhost:8080/api/resource/"+n.doctypes, 
                    headers :{},
                    body:JSON.stringify({data:{"project_name": "Sai"}}),
                    json:true
                    }, 

                    function(err, res, body) {
                    
                    if(err) {
                            return console.error(err);
                    }
                        console.log(body);

                });

{ exc: ‘[“Traceback (most recent call last):\n File \”/home/frappe/frappe-bench/apps/frappe/frappe/app.py\“, line 60, in application\n response = frappe.api.handle()\n File \”/home/frappe/frappe-bench/apps/frappe/frappe/api.py\“, line 116, in handle\n data.update({\nAttributeError: 'unicode' object has no attribute 'update'\n”]’ }

2

this is resolved. Seems related to Body where data was not fully compatible.