How to export 2d assets with layer information from one project to another

Due to third party sdk conflicts I had to move all assets of the game to an empty project excluding dependencies,plugins and other extra folders. I had many layers defined for different assets like background,foreground,top layer etc but they are missing in new project. I tried defining the same name layer in new project before importing assets but it is not working. Its a 2d game,Can someone help me.