{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777704611",
    "entityType": "Track",
    "nonce": "0xf0f6a62d9980fdcbf19f755161bf2d3d1a17c57880e209b9b93c25d3567eb842",
    "signature": "0xf5593784ce08dba063a9811fa08d3d0dd3c128fc68112363191354bdb8d4859e58d65b2138c7f2f42ac42519defddd6a01cf7fddd533fd26bd78aab9dd50a1f31b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}