{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8289ca279007b393fc5395530109ff55f9b672653ab32e3ca491417fbd22d636",
    "signature": "0x87245a95388f3401278ccecf44799e6c65e9a7117b182d196374b8ef243b272a14d42009db8ed202345be49a458d9301c0a880502002c728dda03252a61fbe491b",
    "signer": "0xEEF1ced65C136Bcd432f7E04e0e9b9b6d761ed45",
    "userId": "738410187"
  }
}