{
  "manageEntity": {
    "action": "Save",
    "entityId": "1081644738",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e7e94c3522af1cde9c5806f1a4b69dbf8d9e60547a2da3477e1e9e2bb34ed50",
    "signature": "0x6f592608924eadc645da439189a9d6cab9f1c4c7dddf070ddb7c335a40999802360ba21cffe85a6fdc425174bb045fde98ccfe889c736fbfa98f420b72d59b0f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}