{
  "manageEntity": {
    "action": "Save",
    "entityId": "59662820",
    "entityType": "Track",
    "nonce": "0x557b6690b8758b6843af5593c2487ac6b203ec26f7d0664d3f89d43705f3ffce",
    "signature": "0x3bfafe20b46219c9a055fe4863e6db64cb00b4924529c7867c4d01a053035f087615837e88248950e3105bf06bebce39af89422f022fc1d249028e0232f93f5d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}