{
  "manageEntity": {
    "action": "Save",
    "entityId": "345616833",
    "entityType": "Track",
    "nonce": "0xbd64653655ceff4feea9bfae3edf1bc76b30ec66de7883d6c0761d1f10d8c1a2",
    "signature": "0x7b16a2f6c105455a5913055d66cb73772a9ff0bfb2b49d1bdf72ff54a6f036fe7bc9ff4f2ccd1571be76e0aaf4a81f893cbde278d642d678bbd8081b1906f1b41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}