{
  "manageEntity": {
    "action": "Save",
    "entityId": "262095138",
    "entityType": "Track",
    "nonce": "0x1a89fe9a177b882ef3d3b4997e434e29b7d95a1235c398034d369f80315514ff",
    "signature": "0x53746191bedb2fceba5a03b3f7b5dc6c4a03a29d11c63ab13371bcd08d4ed8a41bfd3fd3eb2fada0ac9a75fe6c9516b831be6fb0ddf983d49a94941ae50157d61c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}