{
  "manageEntity": {
    "action": "Save",
    "entityId": "466185",
    "entityType": "Track",
    "nonce": "0x0f1f53545b26cc42aae3345dcdd3d24a02364c7102a660a12a9656af1b0b5aae",
    "signature": "0xfe0f9e839ab45ad3e1414793a135c1375443b9e83d83e6f0b0dbf656213e5c6167b1cbc804dc5c318f42b7adfd59c48c1087b118fb643d7cc915fbd09fb7d3611c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}