{
  "manageEntity": {
    "action": "Save",
    "entityId": "343407123",
    "entityType": "Track",
    "nonce": "0x5ae01d5d0325e89aabd93481f237a43881ded3706a110ca33834a6261a5c7b62",
    "signature": "0xda6308a5195425b2df98aa57009df2ab6a6c86c8e094ddd4aad008982c96d37544c9a45bdd816a5ffb3fdee2c091493089fba71e1fa638e601c6811b383b690c1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}