{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029395",
    "entityType": "Track",
    "nonce": "0x965e5bf01e4da0102fc3c47d8736066035c067180240369eefa0f773b3bbdbc2",
    "signature": "0x8c41d5bc342bbeab2cfa2ce75c975fbb11e786fd4d18006476fab4eec8b4a358296452537b771873427ceee19e3482392f0f891cb7bb4fc2c1fa9f036db53a191b",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}