{
  "manageEntity": {
    "action": "Save",
    "entityId": "699006",
    "entityType": "Track",
    "nonce": "0xa854f7e89f168e05043b7b33be55ccd6998a87ae3621842fe08c77e074b04c93",
    "signature": "0x47fefbd81073f20282cbc573adde7938c1c361d5d065c730bce81d77a1213eb55d12fca742563eebddc1869367ccbaec67fcdaa381ce67dea2d2d3e30325eef71b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}