{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9cc45d753320cf6d192cb0ec0be81c9a597beae46dc279b63d4694ef3bfa09d0",
    "signature": "0xf7245484ad39e723f2591ef799fca4b24ff22d432f1b053a19378ece230941552abb65402a985640403febff6f8e576683ec46cf9d55062ddb7ce406fd30f96f1b",
    "signer": "0x6C3dfBb34F175eC157f17632F02a690cFC044641",
    "userId": "30425633"
  }
}