{
  "manageEntity": {
    "action": "Save",
    "entityId": "989171",
    "entityType": "Track",
    "nonce": "0x6476dcf7a7c63413a2422a49de019494615b402959adeb2a0babcad26abc066c",
    "signature": "0x90254ab972d0753a19952f01f5c6d6968005a44487af5d9902cd8a8dba727d710e8a150a5884141f2afb09229146b09ad3d335ed75380b4b039188ade698da4b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}