{
  "manageEntity": {
    "action": "Save",
    "entityId": "2140936039",
    "entityType": "Track",
    "nonce": "0xf14909cc41e33e8e1671aaf1ed46342227cc131e2283335f3b7ea443e7ddf8ad",
    "signature": "0xc3d3abbf79ebea2e37466fcf8aae1b8485487903eff0f488a76c31b70e44da0a4596dd842a15d60d75e5704a73feefed2e592b293e967356f96c974a4febfa2e1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}