{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988085541",
    "entityType": "Track",
    "nonce": "0x2c594412e97159a8a70e144c19c8c4d7d239dbc6238769bbc1228b8591294359",
    "signature": "0x3e543f671af994bdc6b434fb9e889c4c48cd63deb33bdcbacc525abf9626536e169d99987c5c90e86bc42510459a853079eb3b2f4568c3dba6325688a8a3bf3a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}