{
  "manageEntity": {
    "action": "Save",
    "entityId": "231538026",
    "entityType": "Track",
    "nonce": "0x64eff3b841610f56fd098a3f0bde3fa3c604a554f18bd594cb5ebceb94797dac",
    "signature": "0x7f67b07eba8b427bf337eee5b2f13cc3dac687a31f1ba998a6afd82fe82bf62e309edad934fad5e8646876e0ae87bee1717a8054fb3cb850c186fd927ff8ccde1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}