{
"manageEntity": {
"action": "Save",
"entityId": "377402576",
"entityType": "Track",
"nonce": "0x60ce4c0b6581e071f0db34278b36a1924d9b9e30ad56a0adc215ec93cae28e08",
"signature": "0xeb2131939c8ca924a430a1de174564e9dc6be61d05b2200549afb134cbd1ad73596c42cc185566642d0e15bd79a938bc07631affe342cc836b59e6045130b5da1c",
"signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
"userId": "105826"
}
}