{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16553",
    "entityType": "User",
    "nonce": "0x692739780240030c6f5c03f72bbf19ee90aa54f074eef85b8fc7ce4188390c77",
    "signature": "0x9c924acdcc9ba7fbe877d72899a341bbc1771bd137c5e75800b4c5d24b0eccf101d946692806f4e4257e2c7f26acd69afd447af813f095aadae39649ddb783351c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}