{
  "manageEntity": {
    "action": "Save",
    "entityId": "799703",
    "entityType": "Track",
    "nonce": "0x9ccdab9a3d1ab7ea95411fd7afd23ebca32d6b92a92785ad341f439a708dbda9",
    "signature": "0x989572c713eabb300393823486dafd571c7bc79cbdf467e52365f72108b8a3a46f4a76910c36441b67f07d00107f20b496337adb0a47925538a891067d9489c01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}