Error on package.json: Unexpected token " at 1:1

I’m trying to add a package in the new Unity Package Manager. I modified my manifest.json to target a local package. I created a new package.json :

{
	"name": "com.enthropia.modalmanager",
	"displayName": "Modal Manager",
	"version": "1.0.0",
	"unity": "2018.1",
	"description": "A simple modal manager which open modals with fade in background. 
  • To improve runtime calculations modals are intantiated only on first time call
  • Only one modal can be open in the same time
  • Overridable Build method can help you to inject datas in modal
  • Can be easily used with UIController",
    “keywords”: [
    “modal”,
    “manager”,
    “enthropia”
    ],
    “category”: “Managers”
    }

The file is found but Unity send me this error:

Error with package details: The file [[MyPath]\ModalManager\package.json] is not valid JSON:
Unexpected token ‘’ at 1:1
{
^
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Any idea?

package.json need be saved as UTF-8 without BOM

Restart the computer was the solution…