{
  "manageEntity": {
    "action": "Save",
    "entityId": "633729558",
    "entityType": "Track",
    "nonce": "0xbe2c627b08af676878b4182df0b3f7c1cdd1546492b14788321bbf861da6584d",
    "signature": "0xdcd0fabd58a947b9fc8f823e87694d5d1588677e1caf304ff609bedb942e192b1f904f076160586677b99d56991f10fce8afcd60dbac6abda5df378c59fd8be91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}