{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa07388e923ca5bee6b37f82b49f262a006b5cc7189a330144171c7ecd65654d9",
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    "signer": "0xa9dE4be0B891b92809B19B7F6ae0C51Ef8e5b0AF",
    "userId": "329426201"
  }
}