{
  "manageEntity": {
    "action": "Save",
    "entityId": "940198280",
    "entityType": "Track",
    "nonce": "0xdd258ee6035380126c811fce186bb52e8084f746b59800cfb10ed7fa0a1b9f74",
    "signature": "0x8ae29a11a9eed4b81dabd5e613ec4e3ece134364b3f9f8331d467f9e863d6075336e625ac8370c3dd0c2bb0b645b1e543561992415718996c598dd03696dd2be1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}