{
  "manageEntity": {
    "action": "Save",
    "entityId": "760335888",
    "entityType": "Track",
    "nonce": "0x83ce6b290d955234a2e0dbc6eb84db441397ea6f26570fa37b70e9f46a386033",
    "signature": "0x13ced15d781d43304cf176ea10b8a3d661648d1111f75fb9c2135ea10529d8da2bc67c0dafdd883e2878fb35a23411576abdab9c162371a237aa0c2c233d2ce81c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}