{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "255354002",
    "entityType": "Track",
    "nonce": "0x1ce9861cdc769d84e2264f3bf47097394fa29d09270c283f23d3afd0b276e263",
    "signature": "0x52157f15f33ed8acb6796542f47f48d9a068602e0b0609ece699f617c8619f4e2ccbd91369904bd9a65db190c9706bd0c6442ae1e73d583b9db9ff971c78ffc41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}