Add a new pet to the store

{
  "code": 0,
  "data": {
    "name": "Hello Kitty",
    "photoUrls": [
      "http://dummyimage.com/400x400"
    ],
    "id": 3,
    "category": {
      "id": 71,
      "name": "Cat"
    },
    "tags": [
      {
        "id": 22,
        "name": "Cat"
      }
    ],
    "status": "sold"
  }
}