Apart from .json files we provide skeleton data in a .csv format.
CSV header: Each row consist of id,3x47 + 1 numbers which indicate The frame number, then, for each joint from 0 to 46 the coords X,Y and the confidence C.

id, frame_n, j0_x, j0_y, j0_c, ... , j46_x, j46_y, j46_c

Sourcecode used to produce the csv file can be found here
CSV files in GDrive
The CSV file is ~6Gb. Float numbers are 4 decimals only.