{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012212",
    "entityType": "Track",
    "nonce": "0x51a4a4c644577408df616d9ffbaf196d0cd19d49da8679280eb3fd63d418f36d",
    "signature": "0xb6e6843584810736cc7cddcdc5743eae03a3be64e8a7b2967e731f6d1682493d011e99d2bff07cf02a9c510b423780276a43e5b0b498030cb72b06658b5ed8f11b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}