{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "888892070",
    "entityType": "Track",
    "nonce": "0xd1bdfb3924356f1ab87259860f03d1b92234138a744793bf96250bc612f5ad61",
    "signature": "0x30cddafcc2078e5fb3a3b26130c3ec9cc2de594424b891f9e7b86da7540248457e04280450cdb8750caea84cc4357cd38b03fee39eddba488cf5018cc28bf3541c",
    "signer": "0xab28764Bd1224556ebA1d8Bc48d3f1F5D2e4E1dD",
    "userId": "281054123"
  }
}