{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x64af358c55e4997df0687a8e0cc9e284f6fbac704dfa06c7d82b168a444f4879",
    "signature": "0x9e150415389aa068fb6de06136c5298a941b4f891b5e990d619e0741fcf5522f46c9b44cfd2031bb5719615cdae655b02faaf9a9ba738f728f7278e8fe15b7201c",
    "signer": "0xBAD4Efd1204a8cD9844091678aaf107a764a0944",
    "userId": "609775955"
  }
}