{
  "manageEntity": {
    "action": "Save",
    "entityId": "291269652",
    "entityType": "Track",
    "nonce": "1792447944732019537",
    "signature": "0x97a69dca3ec8acb9db572a20f214a996d343fd2edd5b2a7284110d96b764387332bd5bcdcada386d0dc4e9b9296ce0940629a1034f0f6c9482178bc3281aac361c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}