Associated Party
The below example demonstrates an update to the first name of an associated party.
{
    "accountNumber": "10003382",
    "entityNumber": "301",
    "main": {
        "repCode": "JC01"
    },
    "associatedParties": [
    {
      "role": "secondary",
      "birthDate": "1983-12-13",
      "firstname": "Johnny",
      "TaxIdType": "TaxId",
      "TaxIdNumber": "123456789",
      "employerName": "Stonex1",
      "employerPhoneNumber": "5205123987"
    }
  ]
}