{
  "manageEntity": {
    "action": "Save",
    "entityId": "226519",
    "entityType": "Track",
    "nonce": "0x1bc75c0686aec2bea231b9a7d6c2106e0fb35d416e8be0d0362dc8677368a0f3",
    "signature": "0x08dc53f47845223a062c54f945aaaf6375558e4f18b6865889c990deb69ea6f46bf62c54d5c3bf111477826cfa1ebcd4d8a87ba548c4981c22227196fd9bd1541b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}