{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c92fbbc56030f6d692fbf040598238f60c21eb9578299276bced6c8b5ea10e8",
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    "signer": "0x32b65D75cfE16eA219975213a981374A4aC2bf8C",
    "userId": "691038481"
  }
}