{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3539",
    "entityType": "User",
    "nonce": "0x116a8460a69b812de45919ff023e3e2ba777b63eee73f4b0b8cbd60117730a0d",
    "signature": "0xe61b1a3eb332d1e6f8fcb04012661e5c87d9a852869579cd14cd37b4c24c24d6007958689ec43acba9ad999f82f6078a52dc8629ec26a0aefa03e7f493cdf7991c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}