{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51888",
    "entityType": "User",
    "nonce": "0x64efaa4dc8e0dc55f68e9a9e4d62698b3e21a2f9ca55a17fc8f43c24418a6f1f",
    "signature": "0xf4fca6f003d8e754a4a312f66800e130d5d53f7aefd32ddffd12af62d891e79b6b27b502489cadfd921c25e5f5ac2af793a89ba58680e73a1a9d6bbc4a1b42ea1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}