{
  "manageEntity": {
    "action": "Save",
    "entityId": "117780",
    "entityType": "Track",
    "nonce": "0x0ab6288313224d2b816c5fba82e57a9f6b6729c2e61975048dc865b18337c433",
    "signature": "0xc230e7a8c05e263cb7b14aff4dbbdac22de71aa90a44be8239565af9105fecab53b8340d8db73d3e84bcf4fa46238cf5dd34a0029ff89ff396f967bf0e8527861b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}