{
  "manageEntity": {
    "action": "Save",
    "entityId": "1774457567",
    "entityType": "Track",
    "nonce": "0xa192dc43a3add68bb8e24f04513e72f1703099124c9f0258a75c001f6cb70a12",
    "signature": "0x8989421e30d44cd47900a2691e998c06afe04ea73edceb9492a4048fb4fa3b443602e7a125b4f8c31509a209f8cee43a99755e637a81f5365a626e352f3b560d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}