{
  "manageEntity": {
    "action": "Save",
    "entityId": "1756957080",
    "entityType": "Track",
    "nonce": "0x52a55ab00db91daf73ace73b7a336a2de2dd094056dc650cb3c6eb61383a1a4f",
    "signature": "0x041475842b8c1fbbbe69a14c60137b4709ff1917d0b7dbc716f9ffc477f40c6d28f7896b635f3cffa429ee4fc96235c3eac3e8cb962bf390bb4c52515e68245c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}