{
  "manageEntity": {
    "action": "Save",
    "entityId": "97208226",
    "entityType": "Track",
    "nonce": "0x6fc593a4c562f477c5a2c4b65ab2f4a882ad8a64243af389c4e1a5abc1576937",
    "signature": "0xd9c8e525edd11c0164a5f24acd96c0356fb71476fa1bbd8a012bc22c2aebf38f5c7f22bc922314eb46015283300b2e86f0cbb7bab2738d32526b3b2dc6d6c5511b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}