{
  "manageEntity": {
    "action": "Save",
    "entityId": "285969572",
    "entityType": "Track",
    "nonce": "0x8c155e6d2b9c483c48a2d437726cf3df83d3cd68dc482045669e924ba36fdfb3",
    "signature": "0xfd336f871b15485ad938b51428978960a1a4b23975cf7d0ec6a97b051a956a244944e941aa1795d9cfa1e5b3559ea80964786a1fdd5cfce90c6162a8beb1f7601c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}