{
  "manageEntity": {
    "action": "Save",
    "entityId": "246375",
    "entityType": "Track",
    "nonce": "0x2da279917d5bfa33c7a2cbfb5579764544d3a8fb8be7e1927cc61107c3805f8f",
    "signature": "0xbb9e2572ff7aa8b5cf65eb484bca063d2127a51797eb9151bd80589280313e903816f79b195fed488101f87238b094326475be029fcaa9beebf21e224c5dc3681b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}