{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "487908",
    "entityType": "Track",
    "nonce": "0xd486a89e61b662f8f24b2762fcc3eea6a6831f562502775ac0b3b413b371fb94",
    "signature": "0xc1bb9f2bcd2ba58df07f73c6966694db0a1b0151f01142f90927f5304d81699d3be4a65df1de1216c2bacc296e184fd8e70e5a7d3e0bc9adddc59ea613f9d2db1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}