{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226597063",
    "entityType": "Track",
    "nonce": "0x3e2502d3b20d94bce09e5bdb89b048d7ff6f1370167529199340a46c4f05029b",
    "signature": "0xce80e4a728414aa1e752591051b3da95a9cd49a9e6b709ed9b651b56b108c748540e5c039de22f99cc12dca23cdf70a62af9efed2e0383f9550ab6e492e2e6c91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}