{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xcd74cc381594504c23c08a348ff2e19025f5cc89b17844b75c42196d4abd7c2a",
    "signature": "0x604c5314ac903f1c4ea25fcdd1461773bf5747d6788fb817bee964557db498f0128a48b8199620004b4dff969772865279fb0535db759a05f4e1a916c1974df01b",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}