post https://api.linode.com//account/settings/managed-enable
Enables Linode Managed for the entire account and sends a welcome email to the account's associated email address. Linode Managed can monitor any service or software stack reachable over TCP or HTTP. See our Linode Managed guide to learn more.
linode-cli account enable-managed
<https://www.linode.com/docs/products/tools/cli/get-started/>
account:read_write
<https://techdocs.akamai.com/linode-api/reference/get-started#oauth>