{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd3fb7328ae515cc1a518cad49d03d0fc2260c3ec0ec94c30aec4ecafce2d2d27",
    "signature": "0x67405e8f66a35202c6a4baaf94fe92b3be34c9863c9027b75d172a450e5a920c1a19854570d3b8f3c65b9c6ad7af117ea896b6e5f8259ad8909a291c75707fe21c",
    "signer": "0xFC0c92eF8cBf61d4fD5a1Cd56650c300c4F54aC6",
    "userId": "161476604"
  }
}