Get an Activity

{
  "object": "activity",
  "type": "call",
  "id": "5d4d879ef92ea143f0e3e0b5",
  "created_at": 1565362078,
  "completed_at": 1565361921,
  "subject": "Call with John",
  "note": "< text here ...> ",
  "accounts": [
    {
      "object": "account",
      "id": "5aa42e5ecb4a290c579aeec8"
    }
   ],
  "author": {
    "object": "user",
    "id": "5a9d0d70ec8d83231af64745"
  }
}
​
​

{
    "error": "404 Object not found"
}