{
  "manageEntity": {
    "action": "Save",
    "entityId": "31221159",
    "entityType": "Track",
    "nonce": "0xefdb7510af22b2ec9708df002a628462985c423b3ab9587eb9f4ba331a0fdf60",
    "signature": "0x358f930b4368c863c469ccadf86687c97add37a1e55a77ad3d9fcc3babee770a0c00543b53c988523c28ff29718beba0811b13ae9acb1310d38caf0960df61281b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}