{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "1449377648",
    "entityType": "Track",
    "nonce": "0x9479918d0b71c488a15616527322f0add0c77ba556e94a7c77a2c128e08e1cb9",
    "signature": "0x8a1834ebb3b5ab99860b3e3ce1ec400a3feabd114ae8f9b8c120dd373e006fee15bf3a58e371a227bd472499aab0589d373cc312984214cf0ff97734ac2595df1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}