{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x47cfb6dc94edbf5529b53ba7125b9f255659dc3a2de8a4cf2de77aa81f8c2d19",
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    "signer": "0x325ebB0cc2Cd4233EDBB752A7855922D0C417bca",
    "userId": "742356608"
  }
}