{
  "manageEntity": {
    "action": "Save",
    "entityId": "1288813052",
    "entityType": "Track",
    "nonce": "0xa85790872423b8488019ec16d421422cd4824bc7cf8b687ba831ced3f294a753",
    "signature": "0x7f1d5c78b6c180b260cea0718f38f2e52a3606c7a2c1e7e78c94d833672f795a1f50ddc53dadb627b1f9f7493a433eb6927f38d00b7655eeadf3040f9a5d6c6e1b",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}