Blender

1. Download and open Blender.

2. Press the A key to select everything and then press the Delete key to remove everything in the Scene.

3. Import Base Model FBX file. [File] - [Import] - [M_Mannequin.FBX or F_Mannequin.FBX] file

4. Check [Transform] - [Apply Transform]

5. Select the object and press the N key to check the Location, Rotation, and Scale values.

[Location, Rotation] X:0, Y:0, Z:0 / [Scale] X:1.000, Y:1.000, Z:1.000