{
  "manageEntity": {
    "action": "Save",
    "entityId": "1295110388",
    "entityType": "Track",
    "nonce": "0x42bc1ca4e9c323032af55b17ea001a19bbd67314aa95f61225d61a18c11f00a2",
    "signature": "0x8cc93110d52eff2a3a973c1388c06b33b68781bf2d9b584ae4c9c9cde714632b0ec1588d4feb5b9a997961090772dae6d9329422083eab6b9a508445cdde78411c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}