{
  "manageEntity": {
    "action": "Save",
    "entityId": "707447694",
    "entityType": "Track",
    "nonce": "0xb266ef56e9343d6afd6dd35ca510e61c07d011f93eb688e0bf530f203aa0498f",
    "signature": "0x6b107e6a2a62d3d6e4bb25e33ba530581f6da0bf31d86bc243ecf4ae7dc8219002d42561c0a594236d4cfc190135cef0fa7b67e376c02ff7d1928b8673f062b11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}