{
  "manageEntity": {
    "action": "Save",
    "entityId": "2051580909",
    "entityType": "Track",
    "nonce": "0xb4d1192c9b78ae972bb0745ff8b20a7c61a932a45c5148a131f560085ac75f61",
    "signature": "0xdb73710f693447786fbe43c738faa31578641aa214782cd300c4d0054b856b6b55b46d283d762fa58016bf31876a6b49cea2de87e252e03c8e9c1ca77f9b608c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}