{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa4f7a9c96f4e618013f77a0a06b69c448c8e474c32655b5e1d615e9e6f875494",
    "signature": "0x6b9014d3d43b87fb18e14ef2dc90745d56106c40143ea03c3e44e15fb0ac5f15375676e5f79e6a5068b8e87849bdd13f0d232a53e4cae6c57f001f843f51dc171b",
    "signer": "0x8525f92f27ED97047EdbAD2569e59b8EC22Fda45",
    "userId": "87098503"
  }
}