{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345619628",
    "entityType": "User",
    "nonce": "0x664e335fc434c32e664b283344aee651d6e6bc5bf06347650cc2b5568df3cedf",
    "signature": "0xa4e6a5f0a78b290cb23f6dfb674d772b0900ac78ed4f80fbf54471e3728afa5a423bc1ba96d98965fc4c35e41c6aced0e2452dfad3826a32decc7b8e088fccf31c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}