{
  "manageEntity": {
    "action": "Save",
    "entityId": "726634480",
    "entityType": "Track",
    "nonce": "0xf1c78534d8c14db29aa3cd637e17b06490169cdd0d7a62a69c689b747a1bf8b2",
    "signature": "0x8558cef278e82bf90de84ddd66381f4045711fc828e3bfdc353e5545772d9d6701f0a360b9b464f19011a9779bb74ff3e9db4d751000ded5dc3d0ca2431398bc1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}