{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058571",
    "entityType": "Track",
    "nonce": "0xd3ce4afdc8cd580a58fa8ff9b0bd5ddd51619857eb7f1b23714925041ff9b947",
    "signature": "0x22d65afdcc277b5d774db321d97aadf34d1cec7d0e351d9f78e6f44a22328eab5d48ead53f05daab5beec3018b9752ad237fdba9a0276dae65f59f8a92fb890d1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}