{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588890277",
    "entityType": "Track",
    "nonce": "0xf14e4c296940528c9029a456b14c46391e89f7f99cbed702d6e230c524c78737",
    "signature": "0xb50364a5d728d488d8663e0ffc63d03827f8c7d221a4eb7edca745592815c29e66217b06209ac3a75f54a23a4feafd3afbef13d91d4f4d372e57ce91a9f152911c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}