{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988723802",
    "entityType": "Track",
    "nonce": "0x8023fa6cefcc743bded085759c0759375cb68708b6f70e22996c700feed508f6",
    "signature": "0xfb87c520241a2b6f6c450b52cedd038561151c3f576676362d8e9de64ef453ef2698e40cbc2bb21966bd8b892a949539a2073a4ebcafd62262094f42649b17df1c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}