{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "28919",
    "entityType": "Track",
    "nonce": "0x5bc998870812105f7ed2054be5a86bf57afd6402723120ddbbde54a443f2ca6e",
    "signature": "0x4cc487bd16751a315bc5f81979629c3fc1ee913ec47ae1aae3a680d0410bdd455abd8d504a91ca1a8dd14cd2a000a0ce3fa395ec3b2ed3c70a3c75d38d67bedb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}