{
  "manageEntity": {
    "action": "Save",
    "entityId": "884614938",
    "entityType": "Track",
    "nonce": "0x406e9f4091647800d67c6f9b802e3e2fac5572ac9de8c98857d211648aa52381",
    "signature": "0xa5e746df1b46cac959964a0acad034767d5ecf54cd81b194846eccd23755e1df6647fb2a8acbd154598d1b6d3bd8640c3b617ca9dca663d1ae78638aa99bc69e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}