{
  "manageEntity": {
    "action": "Save",
    "entityId": "316917",
    "entityType": "Track",
    "nonce": "0x2f5e4412195305382c17a7db6069364c451f62b0be6150d65dedaa3408ee6a46",
    "signature": "0x6b69be591852625f52bf04b009cb38b89f61805679f717556eecb34db33567ff4d93f788dc060b1f0fa1a16130a1685fb863d3b7faa03ae67f651af183faae8e1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}