{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "212485343",
    "entityType": "User",
    "nonce": "0x4d622f331770e617b9e3b3e1b07fdf52668658cf4872eda53332082c66dfadb3",
    "signature": "0x0bff1b417b16cebc58a4aaea7f6493abeabff629d258dcbeebe3880d2f8a553d5b14c6fab4023bf652ca95d2546a0ed71ee0dd99b59e82c3beb3faaf037125991c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}