{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "499441481",
    "entityType": "Track",
    "nonce": "0xff71ec4025440f878b0ec04668491ce7ebb82ec23f1c5e537789db66961c2fc7",
    "signature": "0x8b97dab4ddd014d0a5daf73be8da28ee1304a0ab03bdf17c2900fdd6a0ad59e20fff10720d84964fe11d7488aa6a8204c6e13503d61b877e31d5afd027e2a8301c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}