{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "447254",
    "entityType": "Track",
    "nonce": "0x80c2b8559e2290311767cf341a1164588c986ba1bd4daaa4131e0f29767a72b7",
    "signature": "0x0f8988b43362d0e0ad7fb25127c660281f135268d0cf23ce4f7a63a0267bca8f2c791cfedf897366028fcf9d587c884b860992a948dcf7798e32ced1e9dbe4721c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}