{
  "manageEntity": {
    "action": "Save",
    "entityId": "952312",
    "entityType": "Track",
    "nonce": "0x14638f735d0d1404dde5292780683489af507602c4cc5ae70e08bd383fc6719e",
    "signature": "0x6d81baa0657df90026891931ff884df9e6bc4319a5fca6ee495b2c85438c6bba3de6c98783d9c91481520325209c32ed9cf1b72713b03bbb98ee895d7ff0177e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}