{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe4a3db1f232c5258bf6ada0ab2286f49efda77ce72bc439f6031c1653c67bbf8",
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    "signer": "0x538B73aC8AdF9F1F78e8b6d7edc88BC83F7D0c2a",
    "userId": "459977335"
  }
}