{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116759806",
    "entityType": "Track",
    "nonce": "0xdd2f9083d81525ec263b8bec684cd3939542b9febff0795b28765fd57ddfa754",
    "signature": "0x450efe56997134535d7f813a7bc82b3bc93c6a8121ba27e044e0bd430e9294e1644e285634d16c84eab78c6f7aa2ddea554290002f585c1d1bba22f42784dee41c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}