Writing json to vault via the vault cli

To read data from vault

vault read secret/my_data

This will display something like

Key                    Value
 ---                    -----
 refresh_interval       768h
 client_namespaces      dummy1,dummy2,dummy3
 enabled                1
 env_tag                NonProduction
 event_hub_namespace    dummy-eventhub
 message_retention      1
 partition_count        3
 version                0.0.1

To display in json format

vault read --format=json secret/my_data

Which will display

{
   "request_id": "3636eda1-c052-eb0c-b1c6-3bfff43d86e3",
   "lease_id": "",
   "lease_duration": 2764800,
   "renewable": false,
   "data": {
     "client_namespaces": "dummy1,dummy2,dummy3",
     "enabled": "1",
     "env_tag": "NonProduction",
     "event_hub_namespace": "dummy-eventhub",
     "message_retention": "1",
     "partition_count": "3",
     "version": "0.0.1"
   },
   "warnings": null
 }

You can dump the data section to a file...

vault read --format=json secret/my_data | jq .data > my_data.json

This will dump the following to a my_data.json

{
   "client_namespaces": "dummy1,dummy2,dummy3",
   "enabled": "1",
   "env_tag": "NonProduction",
   "event_hub_namespace": "dummy-eventhub",
   "message_retention": "1",
   "partition_count": "3",
   "version": "0.0.1"
 }

Edit this to suit your needs and write to back to vault as follows...

vault write secret/my_data @my_data.json