{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654995388",
    "entityType": "Track",
    "nonce": "0x4833fd9a13573d62c737a44e176ca8368ab296e7a8628961d761635499924c49",
    "signature": "0xc7236d00c16c071f19505185ceecd16b256b82d8b694612fc501d11e832d70c871eafb9126586c5f6b23f66cfb61987aec792110dca77162ac7a8b853efea3881c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}