{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x861163ddd91a3fbe5bcaa42a7ed1675810d575a648458d1dd61d527e467ff68f",
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    "signer": "0x0771adb9A6E17BA9aB1F311E64BcA474bCE02346",
    "userId": "414202089"
  }
}