{
  "manageEntity": {
    "action": "Save",
    "entityId": "81273",
    "entityType": "Track",
    "nonce": "0xaa6d82cb94d3b1c85994dc7760003812d105555cba1436f87fb4c3f779545261",
    "signature": "0xabbff1de486516131091af3169e2ccb03b66857e9cb4adc5cef803c52f6d275d3bf9c4aa928426c2a054feeb2eea7db50af1466e151a38b5ea0cb81d79108bf31b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}