Bundle for one to many relatipnship

[kahyoongho]

Say I have an entity like so
entity team {
relation managers @user
relation members @user
}
a team can have multiple managers and multiple members (one to many relationships)

I know that I can write bundle with operations as below
operations: {
"relationships_write": [
"team:{{.teamID}}#managers@user:{{.managersIDs}}",
"team:{{.teamID}}#members@user:{{.membersIDs}}"
]
}

I realize arguments passed to run-bundle can only be string
May I know how should I run bundle for one to many relationship in this case?
Besides repeatedly call the api with loop.