{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8dacc782793de451960b75511a165ea36922f894edeb30f098c96c2e1974ce70",
    "signature": "0x79e98402b65ab23331871e5740260c6ca9ecc3a0fe955fd01fab89cb09bee7db50cd41ee92e612470ee8867f3a2f7b439a9143f62b6c8d1b8d62b8382698630e1c",
    "signer": "0xbA5231da41B64fC270444f50999A73f927f23256",
    "userId": "28116771"
  }
}