{
  "manageEntity": {
    "action": "Save",
    "entityId": "230958783",
    "entityType": "Track",
    "nonce": "0x937c95d528d63b39b107e9c3e214b16c16e92863b9be11480bd39d93234d5d4f",
    "signature": "0x7f472d7bd255549c2c59f9329da44da6b1c8ef72f635b21d8b03e6ac23e9b86775f1b91bd1a4dc604140dca8fc6841657dc081703b09adb7cf0f151283a0f53a1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}