{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "150323",
    "entityType": "Track",
    "nonce": "0x0348654b343ba3bf1d224990605c32e376c9f19756e5d01fa2526ca9602215d3",
    "signature": "0x49e9e18e4116303055e160c4342f904a6a7af27854703fea3dcc316a8872a4e117dc8fdf58a2fdd584a0e2a6f5a8248363da6cef9b9a71cfb9d9b231e0ac71251c",
    "signer": "0x77716b11b242ACc386023E99B7e647CaCCcbb8b6",
    "userId": "126786"
  }
}