{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029784",
    "entityType": "Track",
    "nonce": "0x811928378de09145ba5b0a0617742219bf52881b6175685bb93f645dfdeebf38",
    "signature": "0x260065a080025c2aee81beb875260d87ade9672ac951d2acce4d8d96bd9332f955a0063bfe5666dac8a238c01cfd9fc0377bed57c69995b7ba4dd70eb6c550431c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}