title: Json type claim in Azure AD B2C custom policies
body: <p>I am using Azure AD B2C custom policies to get claims from a third party and map it to the claims which are returned in the Azure AD B2C token. </p>
  
  <p>If the third party returns claims in the form of string, my User journey in the policy works fine. My problem is that the third party is returning the claims in the form of json. I couldn't find any relavant <em></em> in the B2C policy's XML Schema that can handle this case. </p>
  
  <p>Is there any way to do this using Azure AD B2C Custom policies ?</p>