{
  "manageEntity": {
    "action": "Save",
    "entityId": "1800533501",
    "entityType": "Track",
    "nonce": "0xbd142557b032ad4b27d0be9eb5f04abfed45cd81a616a81a132078b17e105a9e",
    "signature": "0xd47b8b07899fb6c90c736a78b34c0d4091bced646f1a17f36dc7ffdecd8b0c101b919cc7dc9393ccc5add46db6a2fb2618f4d9c12aa4131b1d7c619e9ef77a191b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}