{
  "manageEntity": {
    "action": "Save",
    "entityId": "1718751507",
    "entityType": "Track",
    "nonce": "0xd95bd4f0388a48bc9d7eeef549ae7cf46cb4caf1582b3d05381efe983baa826f",
    "signature": "0x672592a46100edcb0664e1f47690b5836b32d8ebe10e7792765d05c6e35dace33a8e2370773333109700d5fb2181e911e5469c7c4ac942e521aae614125670681b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}