{
  "manageEntity": {
    "action": "Save",
    "entityId": "941028861",
    "entityType": "Track",
    "nonce": "0xe2785ee25c089a605d541545660f9006c2d7ae5325446843c3a50a90862c1932",
    "signature": "0x399d53a8a9d651f6db02112857a03719054bf67d9e34b9f1cfb5b57a66013c196f9a900d7bbf8c4d86d4cc2a07656ccb61ebc69ae8542f6b0b4e225fd3a170711c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}