{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913686990",
    "entityType": "Track",
    "nonce": "0xe61ed2da7d489b8ba6cc48fb59b64f7e96b9c360cbfd19185b4d32495217d455",
    "signature": "0xd427cf277ecd35433e04af743cd4b6e3d95a67db016c409326ad2331eea8621310d80e74087690cccc9f1e136ce3ab230d2b9acca9aa24b6f06400c704c9e9821c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}