{
  "manageEntity": {
    "action": "Save",
    "entityId": "891859641",
    "entityType": "Track",
    "nonce": "0x1f9a61f0067188c180453ce32ba8d2b147404ca07e0376c0d748ce6698d70efb",
    "signature": "0xac19bbd25419f4d94c87bfeb225dd188d469d86f79a5853088be0b3d00d13f1a0cb79f367ea8c5587af43e4b8979613a974fa87958714e18b29cf242fa86cfff1b",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}