{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004362182",
    "entityType": "Track",
    "nonce": "0x8c5232722f1cd793e9eef6d63835e65c4a33d8a5432d62286268aa628553b003",
    "signature": "0x980778a5ec8ccb7f7de9b224f4b3cae1cf33e3c6c84b0dac8615742aec33b5d03fce118225e0e7bf3502d81e13e0681b8adb222edaad2750f72c781692319ba51b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}