{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9472d865018a93ebbdae1cab1aa02e9da731f14efc0cc2e7ef48cfaf9db8cd08",
    "signature": "0x350675a2d0608daef5aaa14cf62faa840a0bd1d7c1fa39d70eaa9b48e7ddd1be34570022a94b4c4c0fe613e8a288bd50c4009dfb52352e7d533582db366314a01b",
    "signer": "0x63d394E88B78FF653F4FCeB0AC74Cf5b064dfC34",
    "userId": "633246973"
  }
}