const rootState = {
    counter: {
        value: 0,
        message: 'Initialize counter'
    },
    user: {
        name: '<name>',
        email: '<email>'
    }
}
// ...
const store = createStore(rootState)
// update counter value
store.updateState('counter', { value: 10 })
// update counter message
store.updateState('counter', { message: 'Counter started!' })
// update user name
store.updateState('user', { name: 'Ravi' })