{
  "manageEntity": {
    "action": "Save",
    "entityId": "823932",
    "entityType": "Track",
    "nonce": "0xefe4f240bf2080f06a6dd1d6fec07aaf1d42b2d8c528283cab0d7a919c8ad398",
    "signature": "0xd0e170f59a84b3e57aee1df7188def25709b8ced0b4b3e862faf57bc166c384a51aa332bca13bbc997ce59784e825e5d0c52758dcf11232c8cd4fa59d0656a931c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}