{
  "manageEntity": {
    "action": "Save",
    "entityId": "604234052",
    "entityType": "Track",
    "nonce": "0x147e0b6e26ff4e0f907166898038b4512ab87a7d313d6cb422b0a324b5a618d8",
    "signature": "0x667f73ee07181d0ec82cd980d0d7b5a0c7653d9fbbc6e86b576eb1288188a7f0010bf2b09db3b69a9397189064980ac0609320d5673ed9f786ec21734f08f9531b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}