```coffeescript
class Visualization extends Backbone.Model
  paramRoot: 'visualization'
  defaults:
    parameters: null

module.exports = Visualization```

Add urlRoot parameter to Visualization model in order to update model parameters via api
user
```coffeescript
class Visualization extends Backbone.Model
  paramRoot: 'visualization'
  urlRoot: '/api/visualizations'
  defaults:
    parameters: null

module.exports = Visualization```
assistant