{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "515515586",
    "entityType": "Track",
    "nonce": "0xfc624b6c82724db51a1cb69f46f6e66745fa126e8f728bb6146c96d5dfd098b2",
    "signature": "0x2005a81293fecf086b17359395f59e3c05e04c6b6a4fa00b525c30d8eb01371624037e6f61802b9abbbcaaba24ca2375fdd09dabc56e5d2994f41ba888869fa81c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}