fgo-game-data/master/mstWarBoardRatingOffsetGroup.json

[{
    "ratingOffsetIds": [94055901, 94055902, 94055903, 94055904, 94055905, 94055906, 94055907, 94055908, 94055909, 94055910, 94055911, 94055912, 94055913, 94055914, 94055915, 94055916, 94055917, 94055918, 94055919, 94055920],
    "id": 1
}, {
    "ratingOffsetIds": [94055921, 94055922, 94055923, 94055924, 94055925, 94055926, 94055927, 94055928, 94055929, 94055930, 94055931, 94055932, 94055933, 94055934, 94055935, 94055936, 94055937, 94055938],
    "id": 2
}]