{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "318",
    "entityType": "User",
    "nonce": "0x4fa2014c75396258ca517329bef87b98c09f40f5e38d44fae5111fbb681c8f67",
    "signature": "0x2947b47998ebbaa0fb289ef2fe1b26d6ee4b8c68f962d032e0f7346e6e4b06ab7649bbcf7da0260e875b4c0123f00075fed340e1b73b524cf6160d797c1053431c",
    "signer": "0x789F486f6C0BEcF3D1E3B3D82c61D526Fc7Edca6",
    "userId": "57299423"
  }
}