Each array entry of the claim value is a scope-token, as defined in Section 3.3 of OAuth 2.0 RFC 6749.
The following example illustrates the "scp" claim within a JWT Claims Set with four scope-tokens.
{ "aud":"https://consumer.example.com", "iss":"https://issuer.example.com", "exp":1443904177, "nbf":1443904077, "sub":"dgaf4mvfs75Fci_FL3heQA", "scp":["email","address","profile","phone"] }