{
  "manageEntity": {
    "action": "Save",
    "entityId": "154150",
    "entityType": "Track",
    "nonce": "0x5d9a36b925b89629ed8f6a794abbcff4c35165e01b4c1db4afb4e2c103a35a07",
    "signature": "0xbbbda90f708f339f26a757392572052ad322c043b0f595ace1d7414536d2d3ec0fe6dbb1c232648f1634d572c5f8b87a41f3d2f1ffd6c1cd03482c7c4c28563e1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}