Pass functionName and serviceName via function and service object?

[pmuens]

functionName and serviceName should be passed in as an object so that we can easily add data later on.

so instead of:

{
  "serviceName": "my-service",
  "functionName": "my-function"
}

we should do:

{
  "service": {
    "name": "my-service"
  },
  "function": {
    "name": "my-function"
  }
}