{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072200437",
    "entityType": "Track",
    "nonce": "0x1499156f2f7a8bdc40932c4473a229fabff007a295d290f28c4209bc8492f697",
    "signature": "0xd9393f3f50c85c2e89d1ddfdbb81b5a4d15ea7fffcdd77dc46f8de87cd9ced9845f78c5b8c5a960aecf052692be7d380bf84ddc198a5c4989d9ba36eee5093d11c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}