{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c5473829f3c99ed11c1e8e3d95e2df9f08015f4039dbafd0cce5bb500184c4d",
    "signature": "0x35067707999f9dcf15813fa5b5ebc31481778873498d0c2f15ff6a584e2e067267bfe97e2debcd4c7e17100b563db182527f175ada2ece4c4d48eb0d7154b1631b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}