Create new doc and update field value in client script

Hai everyone !!! I have to create new doc in client script and upadte field also in client script,here is my code

cur_frm.add_custom_button(__(‘Issue Amount’),
function() {
var jr = frappe.new_doc(‘Journal Entry’)
frappe.call({
“method”: “frappe.client.set_value”,
“args”: {
“doctype”: ‘Journal Entry’,
“name”: jr.doc.name,
“fieldname”: “user_remark”,
“value”: frm.doc.remarks
}
how do set the field(user_remark) value