Store tags as lists so that messages look identical after being round-tripped via JSON.
Store tags as lists so that messages look identical after being round-tripped via JSON.

vishwaprakashmishra/xmatrix,harrissoerja/vumi,harrissoerja/vumi,TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi,harrissoerja/vumi