query GetCustomer($id: ID!) {
  getCustomer(id: $id) {
    id
    entryType
    customerType
    displayName
    email
    phoneNumber
  }
}

{
  "id": "id"
}

{
  "data": {
    "getCustomer": {
      "id": "id",
      "entryType": "string",
      "customerType": "string",
      "displayName": "string",
      "email": "string",
      "phoneNumber": "string"
    }
  }
}