I had hard time figuring out what's the major problem in this editing (1st image. I manually placed the hand and sachet in this photo).
But the I figured it out after few days that it was light and shadow related problem, on especially hand.
So, to experiment, I took a real photo of a hand and sachet, with almost same angled light source (sun) and placed it on photo. It looked much much better without any special editing.
Now the question is: How can (if possible) I use Photoshop to fix the shadow on lights on hand in 1st picture (2nd is already fixed, but that is a real photo) to make it look little more realistic?