{
"manageEntity": {
"action": "Save",
"entityId": "391497558",
"entityType": "Track",
"nonce": "0x2abbe6d1d33b50664c978ce539348b5d025fb862ec375b533e635af9be4e8f19",
"signature": "0x671072185c5cd94fa4567cef8542a61a9647b82412d0a7a4539d2b0a1b18fc0a169356c29e7ef99dc438039248af81ad8aff8401d39eec0d70be6007bb058a001c",
"signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
"userId": "333763354"
}
}