{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425903640",
    "entityType": "Track",
    "nonce": "0xc77b2d69997b7f386f52b0d45adcb426e14c1ca3dcc6f2bbe5d8655299d2854f",
    "signature": "0x33abb852097c0c9c5f7ef41f5302726267177df3ae2135216e852afffa4005e551c48377c7fbd050d708b63233a8ffa277c4a4c50df383a8dc3d90cd9f47e2a21b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}