{
  "manageEntity": {
    "action": "Save",
    "entityId": "178249",
    "entityType": "Track",
    "nonce": "0x4532de065b557d7cc9dcbdde7dc4a5ed3f8e630e6a2b01de6544b96f1a952132",
    "signature": "0xc33dbe4288e64da54fbd881bee477fb0037c34d6e04d7e7134122c93d11a539c4c49c13461b0d1f88afed61fd6451d2f0f9ff1de807c1ba005b456ed9e6d9d2f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}