{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x914d02400d8eb1268e40b0006a31f71b3157c72628eda355e1fe467fe9bc5d78",
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    "signer": "0x1694Fab9C5899cCF9Bd095c5091b101286e574E6",
    "userId": "572125140"
  }
}