{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "399022908",
    "entityType": "Track",
    "nonce": "0xf28c28171960f44632922be65d1969dbaa6fd95e8ae7aaeb9df1c67d92b9c038",
    "signature": "0x561b1bf2800010fef064adde86515dad6d4315062a0cdf4c4c56b5d0c84c673c4ec8a8374b839a9464d193e936d7f0a44c994a8eba17a2709295fcb86c4cba521c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}