こんな感じで動く。
$ jo foo=bar h=$(jo -a aaa bbb $(jo aaaaa=bbbbb ccccc=ddddd eeeee=fffff ggggg=hhhhh iiiii=jjjjj)) | jr -s
{
foo: "bar",
h: [
"aaa",
"bbb",
{
aaaaa: "bbbbb",
ccccc: "ddddd",
eeeee: "fffff",
ggggg: "hhhhh",
iiiii: "jjjjj"
}
]
}