{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf9ca952a79705cb6a68854efbd23bc0e98a72a579ae4b9ab4940ba6d62a20e07",
    "signature": "0xf893f44c39fe2923bc0272f3e158440b6b80ec6c2f94dfa798906c9f5f8aa8a61783e53da463b882ab1130cb7ceb7ac11321ed5eb067dc19eecbe81c1fabc2d51c",
    "signer": "0x21ADB7f97E1a46192A5d3230E20306b7b899bEBA",
    "userId": "305884662"
  }
}