V3 REST Api to deploy app from template


I am trying to create app using v3 api. I’m making a post call to https://{instance_address}/v3/project/{project id}/apps with json data

“namespace”: “app-1234”

it is creating an empty app but I am unable to find parameter to pass template to deploy along with this payload.

Set externalId of the app to theexternalId of a templateVersion (/v3/templates -> pick a template, click on one of the versionLinks, get externalId of that version)

Vincent. Thanks for the direction, it helped.
I am able to deploy catalog now.

Hi, I’m new to rancher and I still have no idea how to deploy an app using API so can you tell me more in details ?
What can I do after getting externalId ?
Thanks in advance.