{
  "manageEntity": {
    "action": "Save",
    "entityId": "839657481",
    "entityType": "Track",
    "nonce": "0x5ea83ccf10ca2105761d877d6677d39587bd93d488cdc05d37e3388445954b6b",
    "signature": "0x17e1ea16f083c1fc1a138905fa35c1ab19dbe7b30f1e957fb4c53e4db150666a1a9f860d6b98868278e923e0f85c49f68b9ce1865c4a6d9d3860aeada42cd5981c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}