{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "218620",
    "entityType": "User",
    "nonce": "0x5687ad8a5804c034a7f02e643c08b5733ee7b2fddbd1b931c825ba7efbca7a7e",
    "signature": "0x8e07883755a0f96087efa44bc9043599925bb3039c6604c3764a2432c62ecadc57b17df65be34ade1c1e1c0072c1d8ad2a5afedc41e611b0af0713faf98307991c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}