How would you index this type of data?

{"windowNumber": 1830323, "timestamp": "2020-09-24T01:26:31.673097Z", "tagData": {"103040840050DDABCD10028300003B93": {"inIntensity": "2542", "inCount": 2}, "103040840004FCA60A64028108F4C764": {"outIntensity": "760", "outCount": 2}, "10304084004CCB348D100283000023D8": {"inIntensity": "90", "inCount": 1}, "10304084005190348D100283000023B7": {"inIntensity": "51", "inCount": 1}, "103040840006FCD0D36E028108F339A0": {"inIntensity": "6848", "inCount": 5, "outIntensity": "2246", "outCount": 2}, "08304DDD0BD2B97F29D551AF40620400": {"inIntensity": "2513", "inCount": 4}, "103040840006FCA5E86E828108F33E35": {"inIntensity": "2437", "inCount": 3}}, "cycleCount": 6, "reader": "xspan-13-e4-42"}

{"windowNumber": 1830324, "timestamp": "2020-09-24T01:26:31.975344Z", "tagData": {"103040840008C8A581E7828400003788": {"inIntensity": "25", "inCount": 1}, "103040840050DDABCD10028300003B93": {"inIntensity": "6485", "inCount": 4, "outIntensity": "802", "outCount": 1}, "103040840004FCA60A64028108F4C764": {"outIntensity": "254", "outCount": 1}, "10304084005CDDABCD10028300003B96": {"inIntensity": "1426", "inCount": 1}, "10304084005190348D100283000023B7": {"inIntensity": "172", "inCount": 3}, "103040840006FCD0D36E028108F339A0": {"inIntensity": "8162", "inCount": 5}, "08304DDD0BD2B97F29D551AF40620400": {"inIntensity": "3741", "inCount": 3, "outIntensity": "568", "outCount": 1}, "10304084005190348D100283000023CE": {"outIntensity": "45", "outCount": 1}, "103040840006FCA5E86E828108F33E35": {"inIntensity": "3531", "inCount": 2}}, "cycleCount": 7, "reader": "xspan-13-e4-42"}

{"windowNumber": 1830325, "timestamp": "2020-09-24T01:26:32.277731Z", "tagData": {"103040840008C8A581E7828400003788": {"inIntensity": "16", "inCount": 1}, "103040840050DDABCD10028300003B93": {"outIntensity": "2145", "outCount": 3}, "103040840004FCA60A64028108F4C764": {"outIntensity": "285", "outCount": 1}, "1030408400C3A2A58DB6028108F33B23": {"inIntensity": "113", "inCount": 1}, "10304084004CCB348D100283000023D8": {"inIntensity": "113", "inCount": 1, "outIntensity": "68", "outCount": 2}, "103040840006FCD0D36E028108F339A0": {"inIntensity": "6069", "inCount": 3, "outIntensity": "1600", "outCount": 1}, "10304084005190348D100283000023B7": {"outIntensity": "45", "outCount": 1}, "08304DDD0BD2B97F29D551AF40620400": {"inIntensity": "7452", "inCount": 6}, "103040840006FCA5E86E828108F33E35": {"inIntensity": "2816", "inCount": 2}}, "cycleCount": 6, "reader": "xspan-13-e4-42"}

how many these fields "10304084005190348D100283000023B7","103040840008C8A581E7828400003788",,,? Too many fields in an index can lead to a mapping explosion.

The largest i have found so far are 13 repetitions. But they can be more. I would say up to 20-25'ish.

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