Vrworks .json file

In vrworks media folder there are two sample scenes (.obj format), SanMigues and Sponza. However, the code is parsing the .json files attached to the 3d models. For instance, the sponza.json

[
{
// this is one object inside the sponza scene is
"file": "Dome/Dome.obj",
  "instances": [
    [ 0.6, 0, 0, 0,   
      0, 0, -0.6, 0,   
      0, 0.6, 0, 0,   
      -6.8, 1.6, 13.8, 1]
  ]
},
{ "file": "Sponza/SponzaNoFlag.obj",
  "instances": [
    [ 0.01, 0, 0, 0,   
      0, 0.01, 0, 0,   
      0, 0, 0.01, 0,   
      -5, 0, 15, 1]
  ]
}
]
  1. What does these values mean? I guess (am I right, what are those 0s then):
scale_x, 0, 0, homo_0,
0, scale_y, 0, homo_0,
0, 0, scale_z, homo_0,
x_pos, y_pos, z_pos, homo_1
  1. In the same director, if I check the San Miguel scene where each object are instansed separately, e.g.,
...
{ "file": "SanMiguel/table2_tablecloth_final.obj",
  "instances": [
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000],
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000],
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000],
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000],
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000],
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000]
  ]
},
{ "file": "SanMiguel/tree1_leaves.obj",
  "instances": [
    [1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, -0.050000, 0.000000, 1.000000]
  ]
}
...
  1. So, the question is, How can I generate a similar .json file for any other 3D scenes I have?