{
  "manageEntity": {
    "action": "Save",
    "entityId": "225365348",
    "entityType": "Track",
    "nonce": "0x279e42ae1d22c135e6e53a9c458b71202fe33aef789512fab166a66246f97720",
    "signature": "0xf85cb8378b870c9764ec276638d5d728c431376ef20a2389cd1e7aa57febcf2d59007369528f04d8014185cc598e983ac8c6698ac3728b2bb22a394c1e00ce2b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}