{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102878949",
    "entityType": "Track",
    "nonce": "0x6a700bf2090f34d0b1b11beb666f8bd366bbedb25c8fe3298ec4177144f1cd81",
    "signature": "0x507d50158160684d7dc0faa7e50b0a7fbd1f7d134712ae963646f1c1463b67e83201989e788eedf4d4a6c0781d1348270d8fdffdabd3396dbc0352b3e78830571c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}