{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0x985579e810d1da0fae51a21ef65b49b32a1e28577c305e3675c783fa8d53612f",
    "signature": "0x3a2bf34d6290f5571c9a9e1f77b261fa586659cc0220dcb898ce5b6451a7002e2471c736da42eb29123ba7dc97ac32212626ed0b9064798e062fc1a7091de5491b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}