{
  "manageEntity": {
    "action": "Save",
    "entityId": "336985430",
    "entityType": "Track",
    "nonce": "0x9d7b41aee6a1366f0d0d437aaa45a154285b8bb04e0e47ebbd643ac129a55aba",
    "signature": "0x66665ee1c7f7d4603d44c7fc68463a6650d38d488499cdc1fc85d7b8c1566cc114c424ac1c6473621f5f63d5c1b1ca0ad859bb5798f7178c7f08d764b596925c1c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}