{
  "manageEntity": {
    "action": "Save",
    "entityId": "839974002",
    "entityType": "Track",
    "nonce": "0x209e54db968a368c6555cdedc738099996cdc1215df630e430a654a3e2650dd2",
    "signature": "0x10aa4ec200543f92f55c2da962e98b3d94101dad11e99f27fe5459621f2ee04b1bcfb3749e872f629fca48fd738696e39fb2ea70303d40c64929dea79fb7a7c41c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}