{
  "manageEntity": {
    "action": "Save",
    "entityId": "51355",
    "entityType": "Track",
    "nonce": "0x7b62e4f1139f90980e625a003ff29d59822144a7172af1f6ce7b4381a9b444d5",
    "signature": "0x0e46849df7798d0ef7fb413ba7ce6d43f9be9bec160f76eccea9cc70ce0751c158c6ec319bfba3e31101ac2aefe8423ec7a43029e6db3835ea7cf0241402ed931c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}