{
  "manageEntity": {
    "action": "Save",
    "entityId": "1190787211",
    "entityType": "Track",
    "nonce": "0xf264a7ebfb03d4977704d5342db6889fd9d111ad0774469ed39fb780863fa86f",
    "signature": "0xc4c1304378e1a4641067b7416febccac7ee6eabcd4d0801b5ee7479c173ba78032112d894d62da3d093158bb1cea08f2f8b4a478551b4f992ef671dbb46653041b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}