{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "439597393",
    "entityType": "Track",
    "nonce": "0x75be1e10c3bbf504ace490ba39f55883ce88a28275572617186c54b50c6bc6cf",
    "signature": "0x2105557fd00a944ddf64f4c2a02bae34d0d0fa8fda29753562e07ed3c6a5a5132cda2600ff08acd106566aa1dd2668159d1cfb48adf512736593c2d7b18ac9821c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}