{
  "manageEntity": {
    "action": "Save",
    "entityId": "368338",
    "entityType": "Track",
    "nonce": "0x4be10f24080a4e31607d42079bdc21a558c44cafee3d5dcc4e41068ddb0417b0",
    "signature": "0x10d04e3953e10c57896d5ee53c21d7fea2a802e87bf527439cfc01d2205aefb57f836ab5294b7d9707e9ce775dd1222bb6affea9baf30b602729099e91781a051c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}