{
  "manageEntity": {
    "action": "Save",
    "entityId": "456500919",
    "entityType": "Track",
    "nonce": "0x5719b0eddf9e52023a6a688b1a1998e62bc279495fcd5d24329d62b69802f913",
    "signature": "0x515abad59395d8dee4a98a68e2fa4779d72532ca8588bf609a5d8d43ed9fba9f03b0ecb5c61d15bcb46374f42f968017a8389605181c5fbeeae58dffd77d9caf1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}