{
  "manageEntity": {
    "action": "Save",
    "entityId": "1486761503",
    "entityType": "Track",
    "nonce": "0x48167d40ef64256765ec4f2604f07acb8e1c5d829bac9d43c7248dbc628daa03",
    "signature": "0x03d91eca22ea31845fd63287708afc2d7042dfba75581b2e58af0660e5d86c5a46dd812f7f7e6f484c9ee9c918cc96bb3a902aacdec9dcb478f1d5b92058f2b81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}