{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441782406",
    "entityType": "Track",
    "nonce": "0xb8a8c92717dba1a2ba8349b9644adc280d35b0a606e1d31309cf87f6cb2f0a72",
    "signature": "0xd79330af05f28c3fd6b908cfc924d1f6bb072faf69ca0c30b94926ff1a012f147c37088f988017efa8cd15eb5d0f1097005dc5401b98d20bc2e20ce2fd2e2a7a1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}