anchor.diff:  < 200
   < Content-Type: application/json;charset=utf-8
   {
  -    "identificationFields":
  +    "identifyingFields":
       [
           {
               "fieldKey": "member_first_name",
  
positive.code: }
  < 201
  {
      "type": "identificationFields",
      "fieldKey": "member_first_name",
      "validation": "^[A-Za-z]{3,15}$",
      "name": {
  
negative.code: POST /lps/{lpID}/mv-md
  > Authorization: MAC id="...", ts="...", nonce="...", mac="..."
  {
      "type": "identifyingFields",
      "fieldKey": "member_first_name",
      "validation": "^[A-Za-z]{3,15}$",
      "name": {
  