{
  "manageEntity": {
    "action": "Save",
    "entityId": "1232115389",
    "entityType": "Track",
    "nonce": "0x531a1330168b3fa2f8905f2db14d77d33682f59957fb50825beab52326766717",
    "signature": "0xa1917d40b516ce129f1b52fc04a951411df25c03799f5729f56632b8b2fbff0364d55331b496bd27e3b36100c8f915ac45fd093b9a33bef226e961209fd293d41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}