{
  "manageEntity": {
    "action": "Save",
    "entityId": "575614089",
    "entityType": "Track",
    "nonce": "0x6005161e041e7ecab6b032531e4b90bfb824262c948ff4f9c4776f23787b9f19",
    "signature": "0xe4fc50363eb028f92e29862789815edf4f0c229589f35bf41eceb990fde7566d33c24d61237c680feb5d9b2a071d8407f383094a43c5fcae5fa16e50b42261211b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}