{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1103ecad5aa0f2ac2297f869348d7dda9529fdc7b51d575c193c9d9611f45429",
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    "signer": "0x809994612a6b13651FC17564142C61C389e13Aa3",
    "userId": "59593477"
  }
}