{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780691444",
    "entityType": "Track",
    "nonce": "0x801e853cb0ff852fd112ea205258efd1364852bf35351bd3c66e9dfe900f9826",
    "signature": "0x79dd5be5345cb4d9eaf70fb301951c751deecc6b96d8b79c7049c13ea6e67ff03bbce62252b7b8dfc88ae995f41343dff5d717196edc58e2f5df9ddff12cb9871c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}