{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247765801",
    "entityType": "Track",
    "nonce": "0xe6c36db66d2e4e4eaa0234aebac6c8172bc072ca2d751c47e688a8bc27e5407b",
    "signature": "0x8c7e66a1caa31b96d267dfdc5fd9898fd4415f91190bbcd9b65b2555756b5fb30a595b937815b15115306498dc1a6f8c9b9311b300a3135127126da6d9991b6a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}