motion_scene.json5

{
  ConstraintSets:{...},
  Transitions: {
    default: {
      from: 'start',
      to: 'end',
      pathMotionArc: 'startVertical',
      // key here must be Key with capital K
      KeyFrames: {
        KeyAttributes: [
          {
            target: ['user_image'],
            frames: [0, 100],
            rotationZ: [0,  360]
          },
          {
            target: ['user_name'],
            frames: [0, 20, 60, 80, 100],
            translationY: [0,-100, -45, -10, 0],
            translationX: [0, 0, -80, -85, 120],
            scaleX: [1, 0.5, 0.3, 0.3, 1],
            scaleY: [1, 0.5, 0.3, 0.3, 1]
          },
          {
            target: ['weapon_icon'],
            frames: [0, 10, 20, 100],
            translationY: [0, 150, 150, 0],
            alpha: [1, 1, 0, 0]
          }
        ]
      }
    }
  }
}