{
  "manageEntity": {
    "action": "Save",
    "entityId": "1619677751",
    "entityType": "Track",
    "nonce": "0x36eac267faeb50f933a24d97c072dff195e87d4887ddac5ab55f68aecb80338d",
    "signature": "0x426eec6dd6d0162dda5fe63307ea5a970fcd9ef827dfbc1046867ebe937680797f52985e8e46d10b9e2de8a31d529dbc028774c34a0f917110d9c4cd30d2b4a21c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}