{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x551196377e72ecdc1bb91e3e55b962fcc67c6cf6a3c303256eac0b5940f4952c",
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    "signer": "0x57B081abCE3D03a3B291fE71a5aaF1110c38e4b4",
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  }
}