{
  "manageEntity": {
    "action": "Save",
    "entityId": "2052328629",
    "entityType": "Track",
    "nonce": "1786839889411226252",
    "signature": "0x46ccc9d600cdfb45cbce2634796b303f188baacbb944abba8f22e8f83338d73000db4d966c0599f3642bcd439e4ca4d068e8695c03fd85165f83e2ac93e645141b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}