ModelTestEntity
public class ModelTestEntity extends ModelBase {
    public ModelRenderer rightarm;
    public ModelRenderer rightleg;
    public ModelRenderer head;
    public ModelRenderer body;
    public ModelRenderer leftarm;
    public ModelRenderer leftleg;
    public ModelRenderer jaw;
    public ModelRenderer head_1;
    public ModelRenderer leftarm_1;
    public ModelRenderer head_2;
    public ModelRenderer leftarm_2;

    public ModelTestEntity() {
        this.textureWidth = 64;
        this.textureHeight = 32;
        this.rightleg = new ModelRenderer(this, 56, 0);
        this.rightleg.setRotationPoint(-2.0F, -5.0F, 0.0F);
        this.rightleg.addBox(-1.0F, 0.0F, -1.0F, 2, 30, 2, 0.0F);
        this.head_1 = new ModelRenderer(this, 0, 0);
        this.head_1.setRotationPoint(9.6F, -22.0F, -2.3F);
        this.head_1.addBox(0.0F, 0.0F, -1.4F, 8, 8, 8, 0.0F);
        this.setRotateAngle(head_1, 0.0F, 0.0F, 0.7508406442079606F);
        this.head_2 = new ModelRenderer(this, 0, 0);
        this.head_2.setRotationPoint(-14.4F, -16.7F, -2.3F);
        this.head_2.addBox(0.0F, 0.0F, 0.0F, 8, 8, 8, 0.0F);
        this.setRotateAngle(head_2, 0.0F, 0.0F, -0.6696828339902242F);
        this.leftleg = new ModelRenderer(this, 56, 0);
        this.leftleg.mirror = true;
        this.leftleg.setRotationPoint(2.0F, -5.0F, 0.0F);
        this.leftleg.addBox(-1.0F, 0.0F, -1.0F, 2, 30, 2, 0.0F);
        this.head = new ModelRenderer(this, 0, 0);
        this.head.setRotationPoint(0.0F, -13.0F, -0.0F);
        this.head.addBox(-4.0F, -8.0F, -4.0F, 8, 8, 8, 0.0F);
        this.leftarm_2 = new ModelRenderer(this, 56, 0);
        this.leftarm_2.mirror = true;
        this.leftarm_2.setRotationPoint(0.0F, -0.3F, 0.0F);
        this.leftarm_2.addBox(0.0F, 0.0F, -0.5F, 2, 30, 2, 0.0F);
        this.setRotateAngle(leftarm_2, 0.0F, 5.4255732191245386E-17F, 2.8611121309664855F);
        this.jaw = new ModelRenderer(this, 0, 16);
        this.jaw.setRotationPoint(0.0F, -13.0F, -0.0F);
        this.jaw.addBox(-4.0F, -8.0F, -4.0F, 8, 8, 8, -0.5F);
        this.rightarm = new ModelRenderer(this, 56, 0);
        this.rightarm.setRotationPoint(-5.0F, -12.0F, 0.0F);
        this.rightarm.addBox(-1.0F, -2.0F, -1.0F, 2, 30, 2, 0.0F);
        this.setRotateAngle(rightarm, 0.0F, 0.0F, 0.10000736613927509F);
        this.body = new ModelRenderer(this, 32, 16);
        this.body.setRotationPoint(0.0F, -14.0F, -0.0F);
        this.body.addBox(-4.0F, 0.0F, -2.0F, 8, 12, 4, 0.0F);
        this.leftarm_1 = new ModelRenderer(this, 56, 0);
        this.leftarm_1.mirror = true;
        this.leftarm_1.setRotationPoint(0.0F, -2.8F, -0.8F);
        this.leftarm_1.addBox(0.0F, 0.0F, 0.0F, 2, 30, 2, 0.0F);
        this.setRotateAngle(leftarm_1, 0.0F, 0.0F, 3.530704642580201F);
        this.leftarm = new ModelRenderer(this, 56, 0);
        this.leftarm.mirror = true;
        this.leftarm.setRotationPoint(5.0F, -12.0F, 0.0F);
        this.leftarm.addBox(-1.0F, -2.0F, -1.0F, 2, 30, 2, 0.0F);
        this.setRotateAngle(leftarm, 0.0F, 0.0F, -0.10000736613927509F);
    }

    @Override
    public void render(Entity entity, float f, float f1, float f2, float f3, float f4, float f5) {
        this.rightleg.render(f5);
        this.head_1.render(f5);
        this.head_2.render(f5);
        this.leftleg.render(f5);
        this.head.render(f5);
        GlStateManager.pushMatrix();
        GlStateManager.translate(this.leftarm_2.offsetX, this.leftarm_2.offsetY, this.leftarm_2.offsetZ);
        GlStateManager.translate(this.leftarm_2.rotationPointX * f5, this.leftarm_2.rotationPointY * f5, this.leftarm_2.rotationPointZ * f5);
        GlStateManager.scale(1.0D, 0.6D, 1.0D);
        GlStateManager.translate(-this.leftarm_2.offsetX, -this.leftarm_2.offsetY, -this.leftarm_2.offsetZ);
        GlStateManager.translate(-this.leftarm_2.rotationPointX * f5, -this.leftarm_2.rotationPointY * f5, -this.leftarm_2.rotationPointZ * f5);
        this.leftarm_2.render(f5);
        GlStateManager.popMatrix();
        this.jaw.render(f5);
        this.rightarm.render(f5);
        this.body.render(f5);
        GlStateManager.pushMatrix();
        GlStateManager.translate(this.leftarm_1.offsetX, this.leftarm_1.offsetY, this.leftarm_1.offsetZ);
        GlStateManager.translate(this.leftarm_1.rotationPointX * f5, this.leftarm_1.rotationPointY * f5, this.leftarm_1.rotationPointZ * f5);
        GlStateManager.scale(1.0D, 0.5D, 1.0D);
        GlStateManager.translate(-this.leftarm_1.offsetX, -this.leftarm_1.offsetY, -this.leftarm_1.offsetZ);
        GlStateManager.translate(-this.leftarm_1.rotationPointX * f5, -this.leftarm_1.rotationPointY * f5, -this.leftarm_1.rotationPointZ * f5);
        this.leftarm_1.render(f5);
        GlStateManager.popMatrix();
        this.leftarm.render(f5);
    }

    /**
     * This is a helper function from Tabula to set the rotation of model parts
     */
    public void setRotateAngle(ModelRenderer modelRenderer, float x, float y, float z) {
        modelRenderer.rotateAngleX = x;
        modelRenderer.rotateAngleY = y;
        modelRenderer.rotateAngleZ = z;
    }
}

EntityTestEntity
public class EntityTestEntity extends EntityEnderman
{

	public EntityTestEntity(World worldIn)
	{
		super(worldIn);
	}

@Override
protected SoundEvent getAmbientSound()
{
	return super.getAmbientSound();
}

@Override
protected SoundEvent getHurtSound(DamageSource source)
{
	return super.getHurtSound(source);
}

@Override
protected SoundEvent getDeathSound()
{
	return super.getDeathSound();
}

}

(added code to) registryhandler
public static void preInitRegistries()
	{
		ModEntitys.registerEntities();
		RenderHandler.registerEntityRenders();
	}

RenderHandler
public class RenderHandler
{
public static void registerEntityRenders()
{
	RenderingRegistry.registerEntityRenderingHandler(EntityTestEntity.class, new IRenderFactory<EntityTestEntity>()
			{
		public Render<? super EntityTestEntity> createRenderFor(RenderManager manager)
		{
			return new RenderTestEntity(manager);
		}
			});
}
}

(added code to) Reference
public static final int ENTITY_TEST_ENTITY = 120;

ModEntitys
public class ModEntitys
{
	public static void registerEntities()
	{
		registerEntity("test_entity", EntityTestEntity.class, Reference.ENTITY_TEST_ENTITY, 100, 16742815, 4684191);
	}

private static void registerEntity(String name, Class<? extends Entity> entity, int id, int range, int color1, int color2)
{
	EntityRegistry.registerModEntity(new ResourceLocation(Reference.MOD_ID + ":" + name), entity, name, id, Main.instance, range, 1, true, color1, color2);
}
}

RenderTestEntity
public class RenderTestEntity extends RenderLiving<EntityTestEntity>
{
	public static final ResourceLocation TEXTURES = new ResourceLocation(Reference.MOD_ID + ":textures/entity/test_entity.png");

	public RenderTestEntity(RenderManager manger)
	{
		super(manger, new ModelTestEntity(), 2.0F);
	}

	@Override
	protected ResourceLocation getEntityTexture(EntityTestEntity entity)
	{
		return TEXTURES;
	}
	@Override
	protected void applyRotations(EntityTestEntity entityLiving, float p_77043_2_, float rotationYaw, float partialTicks)
	{
		super.applyRotations(entityLiving, p_77043_2_, rotationYaw, partialTicks);
	}
}