old_contents: {
    "id":27,
    "name":"Service Differentiation",
    "description": "",
    "theme": "Universal Credit",
    "location": "TBC",
    "phase":"backlog",
    "facing":"internal",
    "phase-history":{
      "discovery": [
        {"label":"Estimated start date", "date": "TBC"}
      ]
    },
    "priority":"Top"
  }
new_contents: {
    "id":27,
    "name":"Service Differentiation",
    "description": "Discovery will look at how we can apply our conditionality regimes more efficiently.",
    "theme": "Universal Credit",
    "location": "TBC",
    "phase":"backlog",
    "sro":"TBC",
    "service_man":"TBC",
    "facing":"internal",
    "phase-history":{
      "discovery": [
        {"label":"Predicted Start Date", "date": "TBC"}
      ]
    },
    "priority":"Top"
  }
  
subject: Update uc-service-differentiation.js