{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1bae109fced1684bee7f104cbd9f46ce832641c7ceb967c2cb6acf5735c4f50",
    "signature": "0x2ee4bce6a36cfe414036f39b6fbe84ee6008df685bebdd292030d84fb02a00143b9a43efa5cfd2b37b135a23bdde19c5083a44edc72d7f3fe80ea048349bfccb1b",
    "signer": "0x7486D58718dCEaa2583b32Df92595C93021BdC72",
    "userId": "183543320"
  }
}