{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625380420",
    "entityType": "Track",
    "nonce": "0x037c1c7c66273ca1f8978312a8444e6e7304d72666eed3d96c7fe1d6dfa68eda",
    "signature": "0xe41a3d3579ad8041d18e56d4b86774c64f63fd9e8e368ff09edb2e76aaf9ed3e0441f06ec7c64570a4117fae54de0ad0f3985d00b274ebfdf38fb66d7e1254901c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}