{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "153853",
    "entityType": "User",
    "nonce": "0xe6922f07416065e01ec14efd60b54fd8552a8db128bf28cf9ce7c78ddfbb3d1e",
    "signature": "0xf01ce7fabdc10f10ce7b3a75a4f765eed4b78a151cbd4dab6ac3c603bc4c641b3f2a4b46e16ff1040c68401bdb2b0b35529261e743e385f94704843a6c01b02c1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}