{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947692486",
    "entityType": "Track",
    "nonce": "0x1c49ef5bd9dabb40d8d2257055825ee8f483166c3b6640c4e56ab4f8e3f92237",
    "signature": "0xfd16a105b3c0cdf730e28dfa7ad90ff944c17590712f8e2220f59ef03fbe680c0326e88b38ec4577c0c427531350aa2e834be9445d21026cba46cc627f09cdeb1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}