{
  "manageEntity": {
    "action": "Save",
    "entityId": "108862",
    "entityType": "Track",
    "nonce": "0x02427d40afc13291742afd5823beb1cb43f72ab59c18ee3c3b7ee83f0edd5ad0",
    "signature": "0xd441a02ca6e3fe1766bf4c7917dbd2bdb43b1e94f32f72a36feafa4bfea23f8f7331a6818ec52fa1b02d6c2d19d5b5a372ff30bc02d3a6c2a5931a830f3e78ad1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}