{
  "manageEntity": {
    "action": "Save",
    "entityId": "213365438",
    "entityType": "Track",
    "nonce": "0x25074b85468505f678d02cb2f6cd94b6109592c5296c0bde46785eed289319e0",
    "signature": "0x2055dfd1ca959b98890060cc88fdb5fed0993ccff2efa4391194b6021510147350050045ec9db9e45c49959570ba0442c35fec671f0b6f1fc2105de264daf81d1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}