{
  "manageEntity": {
    "action": "Save",
    "entityId": "1653421522",
    "entityType": "Track",
    "nonce": "0x081678ae9501095ad1c3c876de6f0d5f4bd1cbd4638b79b7238443266690d989",
    "signature": "0xff409cccccad93bf771b071d1cae951015bedb1ef9222e854acbcac7e8ac90c14deb7e8c8b2284d49a927beb39a2a596279f3342182779f34e058b481994f8c01c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}