{
  "manageEntity": {
    "action": "Save",
    "entityId": "1392115923",
    "entityType": "Track",
    "nonce": "0x6bcf07a0867a049c8102e7db83c0113217a632fa062228ecf0bd734a674dc806",
    "signature": "0xbd2bbd20e9cf5f16d6718a3d12df711e663a818e83d42310f670ddfaa55f24a4314376fa675029cc75d3dfc459e137ff598ef3d62d136222800eefd86c8cc8b71c",
    "signer": "0xc876F505cb8a680D38792C141903C53780bc3901",
    "userId": "384345140"
  }
}