code: func feedCreateManifest(ctx *cli.Context) {
  	var (
  		bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
  		client = swarm.NewClient(bzzapi)
  	)
  
  	newFeedUpdateRequest := feed.NewFirstRequest(getTopic(ctx))
  	newFeedUpdateRequest.Feed.User = feedGetUser(ctx)
  
  	manifestAddress, err := client.CreateFeedWithManifest(newFeedUpdateRequest)
  	if err != nil {
  		utils.Fatalf("Error creating feed manifest: %s", err.Error())
  		return
  	}
  	fmt.Println(manifestAddress) // output manifest address to the user in a single line (useful for other commands to pick up)
  
  }
docs: // swarm feed create <frequency> [--name <name>] [--data <0x Hexdata> [--multihash=false]]
  // swarm feed update <Manifest Address or ENS domain> <0x Hexdata> [--multihash=false]
  // swarm feed info <Manifest Address or ENS domain>