{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114153",
    "entityType": "Track",
    "nonce": "0x34d845439397c14b5cbc28c33102e2fbbb9c154f097809bd709f1201ed2b93d5",
    "signature": "0x9990d17d655fa35b66b18c5b2eb795f6f88f81773f9ba0bb0ddd711d85fe76f15ad01e74fdf2046da13cca2d252eef2e737a5909617e860a9e006c9a426e6adc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}