List all study rules versions

{
  "versions": [
    {
      "id": "string",
      "studyKey": "string",
      "uploadedAt": 0,
      "uploadedBy": "string",
      "rules": [
        {}
      ],
      "serialisedRules": "string"
    }
  ]
}

{
  "error": "string"
}

{
  "error": "string"
}

{
  "error": "string"
}