{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "502556",
    "entityType": "Track",
    "nonce": "0x9016e9ea3fd89bf31468c6edb832905be6641172f67daef28004314f90f53590",
    "signature": "0x0d7736d229ae61c2f01c6bef0e957e77ad111a6455980b4f1be7722a1698ade965a72c371625580ec23ce9b8dcae5d0654da4052967a9023feffab9b7a9ddf551b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}