{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580281387",
    "entityType": "Track",
    "nonce": "0x1484709e9ec3088733bea8e58967afe3a8ad44540c1646d9e3881af47f41461b",
    "signature": "0x3bca3532793fe782b7d732a2ff5ef6bcbd783a77c78ce67522ad32188ca8ef8c16f4071afd5425249cc4206af0b85a1f369c02074b27f319a52be286bfe277ef1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}