{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x10a9a9a60290d6f5fdf8a1be74177e135b38f51c7ffc984b6d031d76f9138ee0",
    "signature": "0x3c1b34bb9684b376ef159cab892a78f4a8e3090ed95b57e2ad808b26c3c787db2cd538009a703fbfacc8586f994cd5b0648f703aca13c97f5e272fe1f457859a1b",
    "signer": "0x164A6D83Ac1907c8B3aAAd922d608eF9C6304BAc",
    "userId": "666565598"
  }
}