{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc494bbe5327cb04b3250b8054df8b962bd9031d28ebf53cdad33223f18d93caf",
    "signature": "0xadf24359edbf11b5f73b66c72ff0b8ebd92080f45977ad805f3f100c3a5a9b803e8cd231c74e208ff552e456306cb02455674d2f406b25747d98681db85af1561c",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}