keyvalult base64 encoded json as secret

gistfile1.txt

$ cat secret.json | base64 > secret.json.base64

$ az keyvault secret set --vault-name alice --name secret-from-cli -f secret.json.base64
{
 ...
  "tags": {
    "file-encoding": "utf-8"
  },
  "value": "ewogICAgInRoaXMiOiAiaXMiLAogICAgInNvbWUiOiAianNvbiwKICAgICJtYXliZSI6IHsKICAgICAgICAieWVhaCI6IDEKICAgIH0KfQo=\n"
}

$ az keyvault secret show --vault-name alice --name secret-from-cli --query value -o tsv | base64 -d
{
    "this": "is",
    "some": "json,
    "maybe": {
        "yeah": 1
    }
}