{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847040270",
    "entityType": "Track",
    "nonce": "0xf49a91ab28600df63e7a9184e9b12412550a49af89ebe07e1ed56ad167e31f5e",
    "signature": "0xc93cfd5672339cf73bd7b718f5563059f18e9e904a2f7a393d5ee80e6bcd83b372a0eead221a363f422c0212d3181f98923accad3cd27b5593ad29645bc218e01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}