{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681864718",
    "entityType": "User",
    "nonce": "0x9e4e56726c53de7c4756cb3827439c2cdaae6ec191020ee6a55cac568ea48deb",
    "signature": "0x5e4acb6f0c1f9d26905cfab0100a30a7981c8dac29fc397cfd9a2b33302cae25058ba9aeb8d21c48ede93eb0634e42c94c104d6dfbd672f5bb147ec3ee9315551b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}