{
  "manageEntity": {
    "action": "Save",
    "entityId": "2127101245",
    "entityType": "Track",
    "nonce": "0x15c7f716b59eaf2600561d6ab10bd92bdcde02818037530d4799669d1abb0fa2",
    "signature": "0xe4888733e1ff376839fcff8b01a6f25a05ba94a342ec9a75eb30b80e4a365ac54b38fd35a5147a237502a6110dedb0835d5d95f7d60f331eb7176a02f498e62d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}