{
  "manageEntity": {
    "action": "Save",
    "entityId": "148715",
    "entityType": "Track",
    "nonce": "0xf404d11220d3363fffd902763606a2048cc306066238d04f1a95cbf58df73483",
    "signature": "0x86a709127b16f16e9af633abcbb845540197983d27456c48c4c6c1d136224ba435c597473d071cfbcad01c7b9a588c3eec8d11d1a05b9553e2aad9b54cb9fb9e1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}