{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x562ae6233781d59ceaba0670054b4a78c0cd674262d22c3025b8f9676aff6ee5",
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    "signer": "0x95053e208ed4683dC71E3025336b339dc6C13f1B",
    "userId": "90610656"
  }
}