{
  "manageEntity": {
    "action": "Save",
    "entityId": "2048103852",
    "entityType": "Track",
    "nonce": "0x818d1438143ad6ef648d1911d3e1c40b5333a6486244c1de230d427a561d36f3",
    "signature": "0x10e50672f42d6119b8c707a17c8bd60fc77c283631e87f4e915f6b636d1b360e3d9ea91f74b17a6a347595fec67f0154db466a25a89adb9e8c0348388e7f58201c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}