{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xae0af31e85ff0107c9ada1b2da545614689cd758391fca2d7e0ab3b6c13e7804",
    "signature": "0xac7c010313a188f4fe39d79c1e92ff789f6d1405821efb4e707b1a3b7f3d599e42681b0249e62aa15af3fb34124e801f016e09dba22d6a2cb00eb562550ccd3c1b",
    "signer": "0xa11fd644F6B87c25C5AD19bDA54bEfEf9Eec7203",
    "userId": "384086949"
  }
}