{
  "manageEntity": {
    "action": "Save",
    "entityId": "406710249",
    "entityType": "Track",
    "nonce": "0xc7f38199d5da50f4b776fb82ffcd6809343464c765e9bf47214d9efda6e5699b",
    "signature": "0x52db1d4ed93cef28aa8c568cf5299a365b41f607bf20f3840a14f94088d40caa432d5f49e15cb071b2be5f9e989dd8d718d80a198e3d868ee7a732a0cb259d231c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}