{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x45f8ba53e60c38d6d261ec634b77222ea330cc1846b29409e0342a56a971be4a",
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    "signer": "0x2d179f6eC2BA69eEbB8aA94b02622BeC225b96D8",
    "userId": "104731774"
  }
}