{
  "manageEntity": {
    "action": "Save",
    "entityId": "88498587",
    "entityType": "Track",
    "nonce": "0xee7ce49c525771337e07000ebf9f9a501df04d75b847531a76c92681ebe1350d",
    "signature": "0x9e59eba41f4ab2cc044c9e4d0d4fad7f735e47f3dc9d54f08b0c87d271094bf37ce15c1b5a8f8fec17a839b4003dbfe81796d25ee65e39176ed9a685bfeee8be1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}