{
  "manageEntity": {
    "action": "Save",
    "entityId": "565120728",
    "entityType": "Track",
    "nonce": "0xd5ecbacec846160dbc070cd37cc31ce3a355ea9d44c73fa56824c7aeb943c06b",
    "signature": "0x959d594a9b4fd0943ed17f5f75c27d6fb60b42f83cce3038cf80c5a97ae3241a7c087ac0d11876d7c2c62e635e06ec6dae031fbabaccec433b501a647c395d8e1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}