{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd96ed629fd7c9a3ea58f02801e882bf7663f8cf67e5c000848021a953cd5fe3e",
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    "signer": "0x9E887e026105e890d22b9B4c6aFda62b5026c49F",
    "userId": "728713419"
  }
}