{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416409186",
    "entityType": "Track",
    "nonce": "0x7913da77bff052c6e10fc0ec313bbef9b4b17411ed8a957704d3aba87ff3a360",
    "signature": "0x5aea55b075b4713393c344ee75b8f4121c7bdba4a838bb2f746868fe515f3afe632f0c781de2d0cdbf925d85a94259fe6788b459e4a98a8009fa8fcf7725df541c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}