{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdce95112fcfa592cf62e7a5bbabe1d51b8d08611bfab8aafc064c0918b2c550a",
    "signature": "0xb09b2a29d56c96ef9f7eeab6a173d4f5d95c6ece19ac4d66ef94f695848e659377279b0ea30dafbf31df5366b9eb15388b423e0f05aa0eb27744330b1e678be71c",
    "signer": "0x7b494d7b08190fEc1Fb8F19D19A8bB37B88aDaBa",
    "userId": "46378101"
  }
}