{
  "manageEntity": {
    "action": "Save",
    "entityId": "1560463681",
    "entityType": "Track",
    "nonce": "0x66a9fdeec78cbc3f650d3b4ddc850b482c15a51686ba30b296eb134f12b03d70",
    "signature": "0x571114c7a24be7680e4e029df2cc84c2d79aaaeba2fc4f1db84adf737d44d6d739b932a85271322fe40d2f35df085fc4263e51b29727ab6a407e47be8ef9a7791b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}