{
  "manageEntity": {
    "action": "Save",
    "entityId": "571447922",
    "entityType": "Track",
    "nonce": "0x55703667665dd28b03c7f7e2ba1d78aa023218b7d5bbc39605c522af175f6645",
    "signature": "0xedbf6d5ec92ff497a89f7341657a40111b1ca83529146281b084bea53eda6dbd17a96570251156fa5d17c4f2b49d0643fb172705054f26fe55405d2c91d43c161c",
    "signer": "0x9d2ec6a46a9c5b10e9f194E0d8365Fb4cD986916",
    "userId": "29050"
  }
}