{
  "manageEntity": {
    "action": "Save",
    "entityId": "105542",
    "entityType": "Track",
    "nonce": "0x79eee2803d04427273ffe626f97b0249e8ae251656c5978e5cd08dd4af125507",
    "signature": "0x415758790c6b382261868f92a3331c0be2d0134443cd8b1adf32a0eef203113c5fec46182e04b7b56143e5ae272b6cf4b8cc5406b25cd44b306572ccf88924471c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}