{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327998499",
    "entityType": "Track",
    "nonce": "0xe7c7648bac2980cd35b48b5c20628fd4f64b5bf89228be785cbfbd3ddd193263",
    "signature": "0x5236255558059ccfc6b1a24b774776446d6a0d1fc257e7a4acabdbd1de2f44a43f989bd6fa5ac5aa907387a15a5ba1e31a328e94c05863cb1d1a2fef7a67cc2b1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}