List experiments across the store

{
  "data": [
    {
      "id": "expt_7c9e6679742540de944be07fc1f90ae7",
      "app_id": "quiz_7c9e6679742540de944be07fc1f90ae7",
      "winner_arm_id": "arm_7c9e6679742540de944be07fc1f90ae7",
      "arms": [
        {
          "id": "arm_7c9e6679742540de944be07fc1f90ae7",
          "version_id": "ver_7c9e6679742540de944be07fc1f90ae7"
        }
      ]
    }
  ]
}