{
  "manageEntity": {
    "action": "Save",
    "entityId": "711508608",
    "entityType": "Track",
    "nonce": "0xdbc13d78e21f7b67b0585aa55ccb31d5f5118213b3484e223eaa4a2912b70e14",
    "signature": "0x5389d80cc1aa97f404e33c9c5391954d13c9c789a3bf776072551aaedc69034b3cc4702264b40c85e7b23ddfd84746f0190f68f175bde1d26bec4f6c4d638a4d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}