{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa9c44970d4eb04c8f01c493b853094c949b9a2086ee3784b61cee18deedd23d0",
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    "signer": "0x7BABCBfac3652c0401f5f7C4c5d13Db162EC2f83",
    "userId": "281853382"
  }
}