We have added a feature in a way that will let the users to add custom data to a person or an application.

This way custom clients can store information for users and applications in a secure manner only accessible to that client. Some examples might be preferences such as timezone, language, last online, etc.

Mutation:
clientDataPut - This is a create mutation
clientDataUpdate - This is an update mutation

Currently clientData can be added to person and application and thus these records are returned in CurrentPersonType, OpportunityApplicationType as client_datas as connection_type

Sample request:
mutation{
   clientDataPut(client_data: {applicable_id: 1, applicable_type: "Person", name: "foo", value:        "bar", data_type: "String"}){
    id
    data_type
    name
    value
  }
}