{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614466810",
    "entityType": "Track",
    "nonce": "0xd5276b972463a2576408ed4c93d2899e55e6dd8928b4ddc2302469933a1bb094",
    "signature": "0x7f8596350a703b9a3265c852d9fe1ab8afe2dc60b4510cba06c677ac30f2e4c35e3bb10160ea3b9be2ca8d4bbc5d5c0262eec3bc68903b35a7c7a2a98332bd941c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}