{
  "manageEntity": {
    "action": "Save",
    "entityId": "152839",
    "entityType": "Track",
    "nonce": "0x4dd33e7eadd7ad542c55f8abbd18384e24893a9217dcb1c2047ff1add2760c76",
    "signature": "0x63dcb79bfe10795b60147dc1d97e02e9d20ebed9a520b29bb7d5a584c029a15c50c6fc6d803a50f7653b9ec8e156cd4e1856905020624a6ea942d30e56e568fc1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}