{
  "manageEntity": {
    "action": "Save",
    "entityId": "156922989",
    "entityType": "Track",
    "nonce": "0x0c50e65cce179f6b8a46168175af146285e34a4ee618ceea5269985f0fcadec7",
    "signature": "0x7a689d0e3fa622c5e3d3bb7f460e7b71f3f38c7877cecc3d832e00b4be9b71cf1bcc7ad73e369fe0cb7b3b522fb964e4497b973e2e6ffb46961ecb60423f45f71c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}