{
  "manageEntity": {
    "action": "Save",
    "entityId": "166858",
    "entityType": "Track",
    "nonce": "0xdc10aa938cb1260b1911dafaf222fe3bdfaa5ad4f8288e3b94f3faf64639940a",
    "signature": "0x65f2922150f6df4b19bef71c03a4e2c3127c69252ef2a1325359cd4216b1545e55a03e387a894d77416c05cb8d9f37918c3ae8e89e57a4bf3976baadabb323871b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}