{
  "manageEntity": {
    "action": "Save",
    "entityId": "893473234",
    "entityType": "Track",
    "nonce": "0x937c693a5623ca9bb92ad5611ac7542aa9e3d0fcfe974a2cbdb96c9e6e131479",
    "signature": "0xcbccd84c7bf047ddd6e681c4a88bc63a31fa417d677e78dd775d2829505e00ce66171007f40fc0381075011aa141759ce7a18c1c0dcb4f960b28f7fbbdc9b1981c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}