Before an app model can be used, it needs to be published. This can be done through following call:
POST api/enterprise/app-definitions/{modelId}/publish
A JSON body is required for the call. You can either use an empty one or the following example:
{
"comment": "",
"force": false
}
To add it to your landing page, deploy the published app:
POST api/enterprise/runtime-app-definitions
Where, appDefinitions is an array of IDs, for example:
{
"appDefinitions" : [{"id" : 1}, {"id" : 2}]
}