{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "253431746",
    "entityType": "Track",
    "nonce": "0x60ec1fd3a44fd5218fce8def619930c3d0518ff3cebf1dec7b1faf20d077be42",
    "signature": "0x1ecc16129de883ddefa0ff449b25ab6755cc1c1101960a28271c05abae7d5f006cc40ab6eb03fb3c12f2f99ffb766810384ee658aaf8c1063cae8de6eb1fc5191b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}