{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "642937",
    "entityType": "User",
    "nonce": "0xbfd52eadd701f61b44d81679cd457bf0757130d8de0daaff8f77908389567027",
    "signature": "0x47fe43461ba0f9946a4ad4291bbb83ae5c55f50111ba972eb2b9a99232e47a8b4940c2883189b550cdd2569e42f9277ecdee0db3d36c7dde84e0b489640559871b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}