{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617707134",
    "entityType": "Track",
    "nonce": "0x5cf8ddeaa904102445a6b31b04666f6c2a4c21d5b3ab03cb36804db7e0748ff3",
    "signature": "0x34e87a2044ebb7d6853c9018651c39e68d31855a785bfd7b99c8c620b5a6fca20c5762eb2f5fb81e9938da62346b04fa0f8f33bda10097a33ed30922b1ba92321b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}