{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd9bd368bb850152e15efc973a3804ff3fe00041fdc52d673c4d1fe19c3245074",
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    "signer": "0xf7F316bb7D0F92fFB2Ed795348f4372dE33D6867",
    "userId": "311652750"
  }
}