{
  "manageEntity": {
    "action": "Save",
    "entityId": "38643",
    "entityType": "Track",
    "nonce": "0x134c0c2d9f6214f5efd69d0df68b5ac20f372d86a3641876be8ce247f323f662",
    "signature": "0xf03bc6e9fa1f23b33fb94d134a907564f791ed813e598a6d52445285e0a374532860bf684a838786ec3c5637c2bb868dc77f51f1d33dd250905b3bda0ad628311b",
    "signer": "0xCCe749020E45FB96926be24f94FFA5f35e955e66",
    "userId": "810833505"
  }
}