{
  "manageEntity": {
    "action": "Save",
    "entityId": "863436937",
    "entityType": "Track",
    "nonce": "0xd3e6679eca430a4c5f5a7dc7d2c5b9668d05a6707b4c02b9eacb7180cf9378c4",
    "signature": "0x342de37e7fb0a6fbe2baf28746c8d2462097df46d104ca51630cee9ef9968d7954ed8e2cb79764097f2aba772b18f67fc682679cf4272ecdfae6f046bfa774311b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}