{
  "manageEntity": {
    "action": "Save",
    "entityId": "602117609",
    "entityType": "Track",
    "nonce": "0xd98d9256e24a89393fb59a2b0982be0479e5883e4e04ba32b189ae29c03c7f8c",
    "signature": "0xf3c1691ffb26f2eea701172737606c8c24c1400364217de32f81b15c5d1673f060a2b828180b60e29aea8856e617f932e55559f3cc41e700ef7d3abc8bf2b1711b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}