{
  "manageEntity": {
    "action": "Save",
    "entityId": "910087816",
    "entityType": "Track",
    "nonce": "0x557b3bcf7c9174114fa575935a432ebbead5534db40c2d6c35991533e706537f",
    "signature": "0xd389fae3002306dfe3f87c49ac9da5e085c115cad41aa736b975d84f80f866d9106c47551a8b5ff4ba7eeb3522c0f9b82e2d6049afaac9ed0f2d5fe76c379efb1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}