How to return google/jsonapi as JSON using echo

api-server.go

package main

import (
	"github.com/google/jsonapi"
	"github.com/labstack/echo"
	"net/http"
)

type Album struct {
	ID   int    `jsonapi:"primary,albums"`
	Name string `jsonapi:"attr,name"`
}

func main() {
	e := echo.New()
	e.GET("/", func(c echo.Context) error {
		jsonapi.MarshalManyPayload(c.Response(), albumList())
    // Problem is that dat returned as Content-Type: text/plain
    // Maybe force to content type to be JSON. Feel like not the proper way
		return c.JSON(http.StatusOK, c.Response())
	})
	e.Logger.Fatal(e.Start(":1323"))
}

func albumList() []*Album {
	a1 := Album{123, "allbum1"}
	a2 := Album{456, "allbum2"}
	albums := []*Album{&a1, &a2}
	return albums
}