{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0deeb50b29a2309fb8ebd985400108b261ae9be050a03487afa83a77d48f62e9",
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    "signer": "0x69d1592ed76BC3Cd9A2ed561f96E8Eed4AcAf835",
    "userId": "668195862"
  }
}