let message = {
  //... other properties
  reactions: {
    // :smile is the custom key used when adding the reaction
    :simle: [{
      key: 'key set when reacting to the message',
      value: 'ID of the user who performed the reaction',
      timestamp: 'reaction time in milliseconds',
      // information about the user who performed the reaction
      user: {
        id: 'ID of the user who performed the reaction',
        name: 'name of the user who performed the reaction',
        portrait: 'avatar of the user who performed the reaction'
      }
    }],
  },
  push: {
    title: '[All platforms] Push notification title',
    text: '[All platforms] Push notification content',
    jPushOptions: '[JPush] Optional push parameters as a JSON string'
  }
};