Returns the sources of the entity an id names, each as a v1 entity with that source's keys, attributes and timestamps. The id is the Base64 of the entity's id (its source key, such as UANjohndoe, optionally prefixed with the subscription code and #, as search returns it). Use the URL-safe form (- and for + and /, padding optional), which needs no special handling in a path. The standard form is also accepted; in it, send a / as it is, not as %2F, and a + as %2B, since an id with an encoded slash (%2F) or with // is rejected with a 400. Requires the Attack Surface Insights permission and a subscription that includes Entity Management.