{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629906964",
    "entityType": "Track",
    "nonce": "0xce88e8f279ce174dcfe6cbdf85a0de8a136da29b8e2f0e96531ebeb47a652a7f",
    "signature": "0xef081313b7b57ae2637a0661183165c7bee9328b43ab2ef0a6f542690985d8940a7ab0b43622f2c46b2bb31a2b5b793aba9dd0cc1662ac161651da3ca60e5aaf1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}