{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "1373899437",
    "entityType": "Track",
    "nonce": "0x3ce9d04ad770fadbd3429245f9c79ca4c6cb46c90665a9dcb27acea92340a7c8",
    "signature": "0x3db8a113a385ee40f18e8cb29e4dd7567ca58188760d0dd256f60685885c155f7757cd0c73bc460a2cbac302f54149cd3ff02cdb1df4064da2e61996d80f46821c",
    "signer": "0xd1A0F8828aCD0Be90f8aF1e4a2B12752544301D5",
    "userId": "929989380"
  }
}