{
  "manageEntity": {
    "action": "Save",
    "entityId": "428415",
    "entityType": "Track",
    "nonce": "0xf6572c337f2a5ac4ea1a060dfaf837f81725886fce5b42fae0b695c7fc0a4820",
    "signature": "0x899eca59e15da946cd09fe2d4f0e8ce884dae90309051e511743a113f115d86a5cb9f93ebaca37d0fc6d0f090b930043a20a6a0562b6458db102281a364e09d41b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}