redux-entities relation issue

index.js

import { combineEntitiesReducers } from 'redux-entities';
import messages from './messages';
import tickets from './tickets';

export default combineEntitiesReducers({
  messages,
  tickets
});

messages.js

const initialState = {};

export default function messages(state = initialState) {
  return state;
}

tickets.js

import {
  NEW_MESSAGE_RECEIVED
} from 'constants';

const initialState = {};

export default function tickets(state = initialState, action) {
  const { type, payload } = action;

  switch (type) {
  case NEW_MESSAGE_RECEIVED:
    return {
      ...state
      [payload.message.tiketId]: {
        ...state[payload.message.tiketId],
        messages: [
          ...state[payload.message.tiketId].messages,
          payload.message.id
        ]
      }
    }

  default:
    return state;
  }
}