{
  "manageEntity": {
    "action": "Save",
    "entityId": "156697",
    "entityType": "Track",
    "nonce": "0xc408a540722c8b6d9883a8caa9f10aacb041f8381163ac05c87e98138ad75de4",
    "signature": "0xaefdc56a7b18868fe47730119fd0201d2bb5aa15cdcd20c066015d481e52973d18c0fe05cd94873b9e2819d44077c87eab1d55aee403dc9ccb270c0937f76ab91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}