dev/defs/custom_property_number.json

{
  "name": "CustomPropertyNumber",
  "key": {
    "int": 127,
    "string": "custompropertynumber"
  },
  "extends": "custom_property.json",
  "properties": {
    "propertyValue": {
      "type": "double",
      "initialValue": "0",
      "animates": true,
      "key": {
        "int": 243,
        "string": "value"
      }
    }
  }
}