{
  "manageEntity": {
    "action": "Save",
    "entityId": "628220856",
    "entityType": "Track",
    "nonce": "0xa5c514780ebe721560070fd564f6c332502a526eb9870ed2905c4f5326e5a50d",
    "signature": "0xf1fe7faf477b44a4fb4f6ad6120bb89c008e71ff327dbb843e40e20b5303385f21b05381af1a30796020ca523a8ccd2edae33eb32ad075bdc97041999ec195a11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}