{
  "manageEntity": {
    "action": "Save",
    "entityId": "1790364531",
    "entityType": "Track",
    "nonce": "0x2c68bd45f41a29566da03f5ff22be94860e7a01e4acfdaf1af76f210d34ae424",
    "signature": "0x7bbd4a6405963c951d859f0ff6ebfc79848c72af4a56f6c0ab007321066e07023a6d708dc23ec4fb27d3391c784b064bbb0c7e4d055b84f7e7e19d1957d6143d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}