{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391528",
    "entityType": "User",
    "nonce": "0x5ca85a4be6c44a9369a37077966f509b4b606138bc2fa264f2d1ac7da908a8c4",
    "signature": "0x3c530a6b5a4a4fa1073ecaa669beae6d37637468aee4ceadfd24c295c5f5329623035c4e5e52d0569872d7eb8035aab2b501fa9ca09b8befeb63f2f60712abd41b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}