{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133211593",
    "entityType": "Track",
    "nonce": "0x5910aaa454700647dbe531e25e6a14a7d4660f49b6bd226204cc7a28634a030c",
    "signature": "0x78ac4078d97285476d3b6632cd8e65740e19a4072e6218a97da8c2ea04bcf5a7296b27d7c94882be833610e7a1980da28d3f405c39ee61ef4ffb56c1540c61751b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}