{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613019347",
    "entityType": "Track",
    "nonce": "0xc8798508906a1f70ecc413a3cceab51ed9264014796d1dcadd0832954e09f4ab",
    "signature": "0x3bb807045566c1595b8e3de0b6b3c895ff8e60ee7e0ca7efd9d662820857d4841d76a5d77dd1db45211a249529a921d990a8f70fb7b9ddd46f3f0b50533c4a4e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}