{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xa281c2a6c1748480d6c878ff2b673a24fc2d29c4762562c978d5b653ef98beab",
    "signature": "0x0845c7b097b286ac3a7351e7a67fcb10623735ad3fa5f9815c2a8f4e719ceec9783a63953badd508ec3522a9667ee4cfacdeb6a5f2e1b0707417e9f4ed174fc91c",
    "signer": "0x3e16afFf69eC32202c1B755Ad919C7aA325B7aBE",
    "userId": "902811065"
  }
}