{
  "manageEntity": {
    "action": "Save",
    "entityId": "393588717",
    "entityType": "Track",
    "nonce": "0x0ba43e513c7a3a54f1e955e6a91ead551aab89e5973118fd0c7443ae000253ef",
    "signature": "0x435d007b566a192175ef182f578549edd24e288c5b7b1198c4ed2f2ebd51205908262d22a6541f3b5c2d69ddfffc275821282cfc6888813bf8df51a25d5ac5241c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}