{
  "manageEntity": {
    "action": "Save",
    "entityId": "1943448009",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x257cd524a1539e9bfd764e14d2b71eae7cff768bae405c87dbc8a4430edee221",
    "signature": "0xb5a9c77359f4e8d5e943f8c26eb2ad35e62f6ca5e0af9f7a97c21c2470d86bf100980d1ead8888e991ed81f302b07691eb93668ba0ef88e7d5fdd2289e8ab70a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}