{
  "manageEntity": {
    "action": "Save",
    "entityId": "835720700",
    "entityType": "Track",
    "nonce": "0x0a0c83aebe1c4a72d3bad0c84b23b3cc1f7e3800c157b60f4aba1e5a874a7c35",
    "signature": "0x3812dc9385d2047b1bbbf03cfaea414a83b87d9d5ff80c8ef11b65f3e74c082952c4460ecfda1996d5dfd1b756c7323f0ddeddbc32b09c94f3e5f8850be35e751c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}