{
  "manageEntity": {
    "action": "Save",
    "entityId": "1140677409",
    "entityType": "Track",
    "nonce": "0xf5f5fda47ad3226110dfbd8bb769b2d4541c3bce0905f3b178916e1592cb264e",
    "signature": "0x1af8017549cd2ae9157b2cac66ab28e12e0c356f53e355ee4eb14edbfa1d723178ae2cfb3f67cf8acf1afe16828b771f4293d190be21eeccdb296ea959dc4c3e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}