{
  "manageEntity": {
    "action": "Save",
    "entityId": "333861",
    "entityType": "Track",
    "nonce": "0x54bfe2ad8747c3e47d304910d8537ecbb69f8870ff8ed99d0b121cc4fb86a69b",
    "signature": "0x6d756101678f013e1d81999fb99ad58c51568f4cb8ba200e9a6583364aa7602a178c7418f0ee359b9510104431b517b2edfb27c8d5baa2e0b6792461f70bbb1b1b",
    "signer": "0x0282346A7cbE9AD4E926935610080D74D8587c10",
    "userId": "345932992"
  }
}