{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe6947dacbe3eaec76da5daabb97a66e1b10c23eddc26874610c167edcadaf043",
    "signature": "0xeb90d2d7b9fe4091782961414228d929126a08cba610c0c88813341b9e800fcf075d0c51c8946a001f96f98895a839d77dbbddc548360ba1c17febe5c590bdd71b",
    "signer": "0x343FF28Ab8C942919E3753f03D78361CA20CA77e",
    "userId": "519346245"
  }
}