{
  "manageEntity": {
    "action": "Save",
    "entityId": "103016749",
    "entityType": "Track",
    "nonce": "0xbb8cec65740bc20670130fb66205f88ffa845f763b63bf9de4197c7432e3b971",
    "signature": "0xc165787fe5cdb11308d4ed5c8594bd51e877e0a899ca2dda8f8df3b654f3d92d06804484d5747c51879c7d609630b1ea50c68dfd2090b87bd894c27aaaaa69741b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}