{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb63d33be0e93b4da1bcebe23055a081f40e6da940fbd844f4278c24109fa363c",
    "signature": "0x6469bbd37e385a5c7d8b9b7e74cbe993c569edb07ce444494625f5c2be226fa373522c61ccb429b6bf954c1ff283bd34f99707ebc536ed531ab6d494a2e310551c",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}