{
  "manageEntity": {
    "action": "Save",
    "entityId": "167840",
    "entityType": "Track",
    "nonce": "0xc2502543ace541b259cc57a96a1c4f1d0718cfd7f8ec2b5ed3e1d621c32969f2",
    "signature": "0x6ce27a487509847bda006ada8ba6c406954365af205db8437a2986516ebcfa47060894a4ed722c96f403d733e40d34dbe1c4c82ebec0720b616af287fff684b51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}