{
  "manageEntity": {
    "action": "Save",
    "entityId": "984150089",
    "entityType": "Track",
    "nonce": "0xe3e9ceac1bdfd00314ce44971990997ef8f0204c9366693fb8b8f490c45d03d9",
    "signature": "0xe12ecb3e24c9a8b8e2a05d958324db9d6ee67f68f4e2a61592f8f1d10fc8a5151b87fe6638a965c3185d96d8fc5bca56f59bc65aef26d92ece388b9614fdba581c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}