{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x41912a240fb1a4ba6992ce6035fed8f7e810ef233050ff194601ee755a91d1b9",
    "signature": "0x4f3f365b694996ddbbc6efffd72150311cd4dc4c9c1b49ef5c37d3e6c81c94ba5e3505d3631e84e7b7ce4f1c449cae8d5683f538e0909c772022fed3d9aa57bc1c",
    "signer": "0xC75a276D0a36850045510B0483E737bCDd1F5E9b",
    "userId": "588125677"
  }
}