{
"manageEntity": {
"action": "Save",
"entityId": "188217323",
"entityType": "Track",
"nonce": "0x74515587e7ab539c277d8fded3ad6139661c42aeec4a2a9a9c6c51c392bc9fad",
"signature": "0x8ff29620015af896cafd6afc907030f4baafd873d05064e8a55c0ffcb825643e340e53ad3f585fc9e243a0e0a7b892079d3b07875a388ecf4f953da41bccc3691b",
"signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
"userId": "100976759"
}
}