{
  "manageEntity": {
    "action": "Save",
    "entityId": "403651234",
    "entityType": "Track",
    "nonce": "0xa4c8a6c1b13b175fa665ba2ef63770a6e3892d3865ef09e833e041962b3b4895",
    "signature": "0x1993347eab4bd4578d4c9a2541fb82df1f892b7d7480c07419a484e36873d7f809778cb1ed2b6919270252406253bd04ceb16ea17f6e0679dffe2484f5c9c26c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}