{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x43350390f94453307ac6b425dbd34246f543731833984c0ea20aa6ddbec54376",
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    "signer": "0x3a6d9Afe6CDd1C057eD5C1A8d504E6F956675D35",
    "userId": "820705315"
  }
}