{
  "manageEntity": {
    "action": "Save",
    "entityId": "770060",
    "entityType": "Track",
    "nonce": "0x580df7fcbce87aeb6ccf4b771c1033c834560be9b71bebd35f917cef21e319d1",
    "signature": "0x2dc2fab8ae208066ce71a9ac3468c5693d3919d48fd6f4f75c4310a20c7d632f56947909ec352ec9db73584549a07565f579255bb27ac79e159d30ccda821bf01b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}