{
  "manageEntity": {
    "action": "Save",
    "entityId": "183655",
    "entityType": "Track",
    "nonce": "0x8b8da690c1a430a4e3c9e8bc20881dfe9880ef600de475225194963a568ead9b",
    "signature": "0x184db2e8541715e037934d86da08db3be8ba3e794626baac618b63abc54a1e1d1f0bbeae379243681a97fbbd535ba9d05b6410a71c78c70c405232ed9723fed61c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}