{
  "manageEntity": {
    "action": "Save",
    "entityId": "1734323481",
    "entityType": "Track",
    "nonce": "0x96f9f90298b152015e3e3d3fc2ed7433a4dcea064c755985766e9c57ba1157c2",
    "signature": "0x395b1a816c8c178eff8b4b41c3bf910adcf9eb49d7628a2f1d3a4e51ef872f6673d1a391cbca9a64ae30ffaa48cb2fffc61a1ec40664c0f61dcafa2f8139fdcd1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}