1. user entity values, for example user.firstName
2. productTitle: the name of the product.
3. productVersion: the current product version number.
4. policyTitle: the policy that the expiring license is associated to.
5. policyVersion: the version number of the policy.
6. daysBefore: the number of remaining validity days.
7. date:expiryDate: the expiration date of the license.