{
  "manageEntity": {
    "action": "Save",
    "entityId": "1187305284",
    "entityType": "Track",
    "nonce": "0x84169781c425a3ff7b0511b19e367b405efcffcd8d04e97c874048053a64da2b",
    "signature": "0xc91de1f2053c8e21384bcce7f5157c6ff5c37ed4fa7b1bfbc011e0166dd91f8455e6cba86d7837259ee332488ab9c6ba01164045a4f5e4a730937d01fea855ef1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}