{
  "manageEntity": {
    "action": "Save",
    "entityId": "405111978",
    "entityType": "Track",
    "nonce": "0x7eb2f6b6805f499289f816c26f03d63a3cd5a4dc466e48c8bfced48c82f65967",
    "signature": "0x6d713213fbcfe5541ec7ad7727aa81950d90cdc424a2fdf7c676fb026c879d9d2d3644f3ef755804001bea71f0a6eee07502d6919d43f3d4df21a08c0c7b70ae1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}