{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689495660",
    "entityType": "Track",
    "nonce": "0x145cebc413f680de2a0a7c67193d246b3e1d55f35a61019eee2c23d241048c0d",
    "signature": "0x902e51726e5f6b811c953f04967ba71b4539c30edb9f55b73e7a92c802e99ae81456d7c1213a57b0d4b505cfc33e9e3d4ebe87ce4c99ebdb1cf1628184a1ecb61b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}