{
  "manageEntity": {
    "action": "Save",
    "entityId": "828741040",
    "entityType": "Track",
    "nonce": "0x12622cf54a9c9ec833155b092f9c507ff5b7aaf6cbf689fb0312597de1756f2f",
    "signature": "0x9ffa9b07cf85c1836f6172af7adb03e02ac67c13eb07f665f29e1e89ca4cdb501dc45454c96fb517780067316f3e47ef46ddf33c07cfca30bcd2a13b23b825791b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}