{
  "using": ["urn:ietf:params:jmap:core", "urn:ietf:params:jmap:mail"],
  "methodCalls": [
    ["Mailbox/query", {"accountId": "acc1", "filter": {"role": "inbox"}}, "0"],
    ["Mailbox/get", {"accountId": "acc1", "#ids": {"resultOf": "0", "name": "Mailbox/query", "path": "/ids"}}, "1"]
  ]
}