{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577586662",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a7ef3d9baabb50a92a484e4949e3cfd8c7cc3339a2df50028b0ac740ede5c82",
    "signature": "0xb1671046688d88754684a4bec62f263345b39434a02faa975369240285c5b1ad4b45a209f5aa7ed2ee665edd90a985bbf1a8d5c24c293017629ea734971b2ded1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}