{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689999214",
    "entityType": "Track",
    "nonce": "0x0ec4326c96402cd2e251709347500f22b64aa5a74fe924c44170e99db26a213a",
    "signature": "0x2d042e9c8b02f1a7a7d20bb78e14795eb707cd89f029ff746a3b54cec1e15b9d3052c134cf124e0501e6b4b0507fe788e516a8c8b3946055989c72eb3bd2be4c1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}