{
  "manageEntity": {
    "action": "Save",
    "entityId": "28332",
    "entityType": "Track",
    "nonce": "0x1e6e593988d760cef8aefc69b171b0c79d5f504cc8012b8406c4c1cb80d2b772",
    "signature": "0x88a560a6801e8b7e5ab17b4fd74d30db2c2e5137ea983d0a706240fc79966c5c1f6c0f9f6b9c128725efa45d672f8dd63007b3e5961b66d8ab45fc16006f2c3d1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}