{
  "manageEntity": {
    "action": "Save",
    "entityId": "919278723",
    "entityType": "Track",
    "nonce": "0x0eaa555126507c8bab449a00ace23ed3dffe774d477feaf0701fef664f1d44cc",
    "signature": "0x376d7365cce705eaf71c8d8a1ec013da40e9e70928f0542ca72e87d9acd31a1e75d7bfde8962f0eaa508d6eca2ce36c9cd50adfec90f069383556353a5fd0c871b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}