{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "821838933",
    "entityType": "Track",
    "nonce": "0x456b7e8870224c89aea0a28b044a6fb30c7079b5d676d10c43ba4667cccd6387",
    "signature": "0x6f0a11df815b5c6af8cbe246125837804f16c406421fb7dc9aa20f26b1fe74fc5da49f2e08e846c8d207f2b5d31a41387db014e26a10216fd388adbd293f2f231c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}