{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d28d59da546c4ff756e5b99c56d6bc6ce490110d5eb95a425cd0eea9abd9b62",
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    "signer": "0x8f658028fD8E1FBA2028aEDade8D43ECF9f55C9a",
    "userId": "606217598"
  }
}