{
  "manageEntity": {
    "action": "Save",
    "entityId": "1110937813",
    "entityType": "Track",
    "nonce": "0x2c258b934ce13a196c29b1c0dc15372cc88476ff0dbc9e6e794aa0a86d4e1a35",
    "signature": "0xa828de500fea040cda621d43abe94f096b01a43adc87ca192669797c890d26a902d42c4ce3ae52a8ff687dea3e5e26150dfd2cac24789731fe422bd6a2ed67631b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}