{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844110768",
    "entityType": "Track",
    "nonce": "0x6221c473fce54f3ad2c5164a8b6d44ac690c1dbde7ada90b6f9093aaf42e8f71",
    "signature": "0xdaed692de92cbbc08dfe64a6eb42a5c7c7ed048fcd52aa728ed854aa12b2462825862f059bdcb8bed15ba3af15b9c26b42c451f5d4a5dde2e83750bdbd7b03cc1c",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}