{
  "manageEntity": {
    "action": "Save",
    "entityId": "1063815714",
    "entityType": "Track",
    "nonce": "0xcacd22b0549b5cce1ecf3be8ca62e7c3026ab24792a46705fcc2cb1263c6394b",
    "signature": "0x3d17f1fa498d9399b40856144d4cb8b0bef1d91a952bd5aa7b0949d4ba7e649472b9b97529c18e2fc487aa49801c8a83a2efc33e0282ba782292e0da15f2860f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}