app_requested event

{
  "type": "app_requested",
  "app_request":{
      "id": "1234",
      "app": {
        "id": "A5678",
        "name": "Brent's app",
        "description": "They're good apps, Bront.",
        "help_url": "brontsapp.com",
        "privacy_policy_url": "brontsapp.com",
        "app_homepage_url": "brontsapp.com",
        "app_directory_url": "https://slack.slack.com/apps/A102ARD7Y",
        "is_granular_bot_app": true,
        "is_app_directory_approved": true,
        "is_internal": false,
        "additional_info": "none"
      },
      "previous_resolution": {
         "status": "approved",
         "scopes": [
          {
            "name": "app_requested",
            "description": "allows this app to listen for app install requests",
            "is_sensitive": false,
            "token_type": "user"
          }]
      },
      "user":{
        "id": "U1234",
        "name": "Bront",
        "email": "bront@brent.com"
      },
      "team": {
        "id": "T1234",
        "name": "Brant App Team",
        "domain": "brantappteam"
      },
      "enterprise": null,
      "scopes": [
        {
          "name": "app_requested",
          "description": "allows this app to listen for app install requests",
          "is_sensitive": false,
          "token_type": "user"
        }
      ],
      "message": "none"
  }
}

The app_requested event payload contains info about an app that a user on a team has requested to install.

Field	Description
app	Info on the app that the user has requested. Nested inside the app field, the help_url, privacy_policy_url, app_homepage_url, and app_directory_url fields contain links to more info.
previous_resolution	Indicates whether the app was previously approved or restricted in this org. If the app installation has not been requested before, previous_resolution won't appear in the payload.
user	User ID of the user requesting the install.
team	Team ID of of the team that the app will be approved for. If null, then the approval request is for the whole enterprise.
enterprise	If not null, conveys that the approval is for whole enterprise.
scopes	The scopes that the app requests.
message	An optional message from the app.