{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb280d291f9602c6a9c5eac274a489e0e8e4f76c1b92ad51d231f0af6effc6b39",
    "signature": "0x561a138bc18ecb82cc5d48c64df738d80e86f5316e9bdf134cff0ee547bc92420993784259885c0efe3e1fddf80dc051fe618e2e85372decc46c80087d045d011c",
    "signer": "0x2bB7E42Bc944D023113eB9E0FC10079AEe4E50f7",
    "userId": "35744067"
  }
}