{
  "manageEntity": {
    "action": "Save",
    "entityId": "322429669",
    "entityType": "Track",
    "nonce": "0x5350e9c7cf00319c4c49fd288ae964b5789e96b7e0cbceaf8fb5c47a57826ae8",
    "signature": "0xa094bb7ca3a9dff4ba9a2bdcb8aae40be060a64d5fced133d0215279446a3eb70f4e67a8f1e765ba63dc3f7f878f6c8b689316fa5163902f31caf300eca60ec11c",
    "signer": "0xC2128703227276e4621dB635cBE2aAe1Ccd7fEA6",
    "userId": "747927961"
  }
}