{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247739600",
    "entityType": "Track",
    "nonce": "0x467bf36046eda7f9b95e65cd7d197241a43d49cb35da32722e3b7769ad8f566a",
    "signature": "0x523360238b7f1e59d9a2793249723f8fa7c3c0fd4d1e758f066fb11616dbe1dd3b762bed7dec329f84f1ecee73e527e6c177e4bb7edc550620a0984f043ee25f1b",
    "signer": "0x253047c0af4Fc72D6658Bc16df0b3FE0dB459513",
    "userId": "186198383"
  }
}