{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765834589",
    "entityType": "Track",
    "nonce": "0x73fb11de2b24bd2388313f6af547ee887991f55016f4903364badb73c3e7c690",
    "signature": "0x02a004e0c50252ea6d5d906ee326e5567650fb23f3dedb755417816b18e210f82d7bc09555315ba92426609a0770d8a42521775624138713b585f42adc800e511b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}