bedrock-samples/resource_pack/animations/wither_skull.animation.json

{
	"format_version" : "1.8.0",
	"animations" : {
		"animation.wither_skull.move" : {
			"loop" : true,
			"bones" : {
				"head" : {
					"rotation" : [ 0.0, "-query.target_y_rotation", 0.0 ]
				}
			}
		}
	}
}