{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa15e5ee52c2ca1231d24727cf875229cf08a4c4166fb5863353557830e6d33d5",
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    "signer": "0x8D25bB22ae062517A949bE42DC902b72e919128C",
    "userId": "140169796"
  }
}