{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x543bf35de4dccf24ad678d2063dad62028e1d01ce424c1fd56277f88a4a4036e",
    "signature": "0xcaaf6a2817e15d7ead53fb8320973c9ea31d451a521d08027f726dfd41d42cde4d4d5193ca377cf4c847e64fa5e688a38d3479b151d94058a85247d67502d4831b",
    "signer": "0xB51d447dEEC53Dc26C68711E9181453DbbDfA499",
    "userId": "610109052"
  }
}