{
  "manageEntity": {
    "action": "Save",
    "entityId": "468408998",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x81c87c0ca9278c25ef12cafc65e057637e1723555f055c7e562c556534d588ee",
    "signature": "0xa5b5a30434be99525790b99a1ee705e570e374725a2ca5755319dd169432dd2b7bb60069ae86fcec9eeaf9bb1eacbc61071ad9dba14726f579c750bd4b4e16571b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}