{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0403f08bef9b30d1561e8405c1f211fa436fdef73fbf74688b7a8ba1de67404b",
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    "signer": "0x12D25A7a19Fe8130A1f3de655f59f1ac38Fe29fB",
    "userId": "566281511"
  }
}