{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ac8fd9dd483a496f1331905df525d9343c8f80aa6884d6c65baeb02942a81b8",
    "signature": "0xfc5a7346532e87db2fb5380ba62cd287f9e1a4b9cab643fbca1bb9ceca18568f1a20668945dd61abe6ec2c1c1a022d3cd054c64b4965c90b33c9d7159f143b0c1c",
    "signer": "0x50b3a71C5800d09987e55a99E96a2eAd00574F4F",
    "userId": "225600275"
  }
}