{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd5624f946908e86bc01324533912337f78b2248e164e6b23e9c422f7f8d8bd1d",
    "signature": "0x7cf205f31ed7c55dcc5357d9e0bf6b0b9ac10353c56a7001e08b345a20155ed51cac9f928936a08f8111d4a8ea5c7fd1bc9b5562c0564d0a3971a35d2ff5c2cb1b",
    "signer": "0x5877F7e1aB261CEa57f1734519117Ed49d50c8c3",
    "userId": "549983695"
  }
}