{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875693562",
    "entityType": "Track",
    "nonce": "0xa5a76d9a32f5838b3aee4e2e104d6fdee254ce87ed607816130ad238761f86a9",
    "signature": "0x94026997254dffcc3f709096ba9d6880ef1e09b03e12fadfb952b3ea529f791d30cd42cbfd7bc281a6dc40ade41d0e909f1eac9ee575f4010addf7fb4a577e5b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}