fgo-game-data/master/mstEventTradeStore.json

[{
    "eventId": 80480,
    "idx": 1,
    "commonReleaseId": 0
}, {
    "eventId": 80480,
    "idx": 2,
    "commonReleaseId": 20098701
}, {
    "eventId": 80480,
    "idx": 3,
    "commonReleaseId": 20098702
}, {
    "eventId": 80480,
    "idx": 4,
    "commonReleaseId": 20098703
}, {
    "eventId": 80480,
    "idx": 5,
    "commonReleaseId": 20098704
}, {
    "eventId": 80480,
    "idx": 6,
    "commonReleaseId": 20098705
}, {
    "eventId": 80480,
    "idx": 7,
    "commonReleaseId": 20098705
}]