{
  "manageEntity": {
    "action": "Save",
    "entityId": "1431322198",
    "entityType": "Track",
    "nonce": "0xf11b9358037a1db780a444fe7bf8d92d817980b662d8477e08a0f305bd2c28ed",
    "signature": "0x2de10f87a34261f07f8f801c9d333380930d377f83d02b759d3b942a5e1c4d6107487779e81276a17c2b448ddc7821456ffac1f7fd3ff937f00714583ff30e4c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}