{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "1508122459",
    "entityType": "Track",
    "nonce": "0x639f4f3a974a9f31afd7de96d5f371a6823a66d1bad00311aa546749251796cf",
    "signature": "0x6ee68ff66ab901d405d87c322113acb05a9f48fb869608aba11d70fe7edfd5902606857fc9e54d72934b8a3aa7d7f5c448fb34c02982158124e57eaf90a609301c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}