{
  "manageEntity": {
    "action": "Save",
    "entityId": "108788",
    "entityType": "Track",
    "nonce": "0x088b8e3760d0583ed53b5b09ab05821bd5227540edcea2a9ccb3ce93dfe3f7f5",
    "signature": "0x5fad80452143887b3f03f9331a9ade8f1b3ce0019f5567a6e6e1d21e8b5aac46069415b0ffe36b8792584da4d5a28d132c0ee099aa61c067c9f7818b94c18d451b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}