{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416876644",
    "entityType": "Track",
    "nonce": "0xb025a6d7505152a678fcc0312033da66058faf0f2661fa1163670c3c61b8901c",
    "signature": "0x8c1a100ba17523836949698e8d3b52f5079596a17b32a094287e77934601d741107ff9e61d42377d0765956c4736a21aba8bff08cc01e51fb18202b173cbe5d11b",
    "signer": "0x8097f7562D3D2F9cbdBA391c45c0D376E438625d",
    "userId": "51978829"
  }
}