{
  "manageEntity": {
    "action": "Save",
    "entityId": "428369",
    "entityType": "Track",
    "nonce": "0x0ca33ae62bba4a6443ff2013bf8b475c81d1b6c0ad85c6827405aa5d0acc128e",
    "signature": "0xc771bcfebb4bad8bd7eafafa7fa7ddaa1ef943c85f6e557e1970599032d6d2b4580b0735baa51fc88e6772798d0f50f6d8946e29f94ce34cc1fbd82830df0cd11c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}