{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x742ab80bc465250fffbfab8349d2dfb3418434988f1fd8f3a95bf2ae9f0a251b",
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    "signer": "0xeB23843BC9063661C7463C5b09a6Cfa6B50B1fdF",
    "userId": "694454106"
  }
}