{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc8f2f6f4a568a333f74cea1144c8e38c952346fa975a6167e6ea861eadf343b4",
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    "signer": "0x1D6CD0F4a3748C8b15b27cE142fb879600cd33f9",
    "userId": "49877197"
  }
}