{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x11cc36cb0b8ff0dc351abb9b503471a9decf2153b8ecaef5be844aa705f14e04",
    "signature": "0x5dc747d50151f7372090444c8f0b6c7b018029703c549797af7205092748684472aede1b523c2e465722df8af983b4c7dad97991e81f93c951ec72d38c654f0c1b",
    "signer": "0xa0505f485c1368eBc751046C288c23ea6263CDB3",
    "userId": "401700982"
  }
}