{
  "manageEntity": {
    "action": "Save",
    "entityId": "884083955",
    "entityType": "Track",
    "nonce": "0x52b704680ebd784dc11bc5766c2b7673353cddab196e571363c67e2a9a51b6ea",
    "signature": "0x1f4961d48055132f7ef5603ba05285d5a23c6c53ab2600bf5f6c32f6771c522b0c81eb8b34a4b1c98e123acb465c9c1ae40a208fa87c2ac424725bb76fba6fce1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}