{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906823505",
    "entityType": "Track",
    "nonce": "0x2035b9c6e5a4f3c12ced0820a450bd553f2e9c4490fe6b701c42343327be79d9",
    "signature": "0x0cf92ccb67902a296b6224722aa1f9c8c2b55e0fbda933313b2710a42003491a5caa5d932e0783244f3365094af123689c3fb0d8e1cd19a14f7b334bfb320cb71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}