{
  "manageEntity": {
    "action": "Save",
    "entityId": "1288634527",
    "entityType": "Track",
    "nonce": "0xa7495e4f37003a706861cbd2fc7597db93b468d3cb765d918b69764f55370dc1",
    "signature": "0xa0fcfa68d0a5bea22af588d88a78bc9938bdf61e0e4e81e785a61272eb3603822d1d3b846590ce342ca306cdc4b2ea279abd57e86ac1f33c95a958888a4449f41c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}