{
  "manageEntity": {
    "action": "Save",
    "entityId": "423315",
    "entityType": "Track",
    "nonce": "0x9729eb5f1ee3c00fb2dd222eff4496d40bb39ae385381006684efe3a6e517d38",
    "signature": "0x2af6e504018a828e93ebcc7b8d2687f557a14e8cf219d8141ace3a68834966651fcf0a7d7440432079bbacff5384d4f16b6614815b9f8541dd80c5f1b1dcbedf1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}