services/src/main/resources/META-INF/cxs/events/form.json

{
  "type" : "form",
  "propertyTypes" : [
    {
      "itemId": "properties",
      "type": "set"
    },
    {
      "itemId" : "source",
      "type": "set",
      "childPropertyTypes" : [
        {
          "itemId" : "itemId",
          "type" : "string"
        },
        {
          "itemId" : "itemType",
          "type" : "string"
        },
        {
          "itemId" : "customItemType",
          "type" : "string"
        },
        {
          "itemId" : "scope",
          "type" : "string"
        },
        {
          "itemId" : "properties",
          "type" : "set"
        },
        {
          "itemId": "version",
          "type": "long"
        },
        {
          "itemId": "systemMetadata",
          "type": "set"
        }
      ]
    },
    {
      "itemId" : "target",
      "type": "set",
      "childPropertyTypes" : [
        {
          "itemId" : "itemId",
          "type" : "string"
        },
        {
          "itemId" : "itemType",
          "type" : "string"
        },
        {
          "itemId" : "customItemType",
          "type" : "string"
        },
        {
          "itemId" : "scope",
          "type" : "string"
        },
        {
          "itemId" : "properties",
          "type" : "set"
        },
        {
          "itemId": "version",
          "type": "long"
        },
        {
          "itemId": "systemMetadata",
          "type": "set"
        }
      ]
    }
  ]
}