{
  "manageEntity": {
    "action": "Save",
    "entityId": "942697642",
    "entityType": "Track",
    "nonce": "0xeaf1579326d70a778aba08dca7a9757f3ec46ad930e4824e178c81f49d4026eb",
    "signature": "0x27c3d7a658b9401c387be20e2d7111d14441f82591ae75adcf1e9d68439209a25ced484234248fa319b40c0d6f9de3123221a7856024914f7159569999fa4bb51b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}