{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9af70989ddede154abfb675467f85907ec0e6f41b96a30cd72960738725524fc",
    "signature": "0xe3aa471a21a60a8061869427270d0152a408d5fdac4a25a0e21a571eab486f7559cf6bfd27e98e22f525171a2819ac7ac17968be7b39d5adbfb8813f444818ad1b",
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    "userId": "700925850"
  }
}