{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6acb8af411f4eb9c34aa3f9e3d4417b04cd4d6b1f3176113fb5499a3fef3f96f",
    "signature": "0xe1fe3918e70ff0bfd7789eb32ed8b75fd98a0670b6b75d4513ef49c2faf7d524591b9a0f605f3a4adac62c7271f948d4b9b015e2b3efc055aeb1bb46773370b51b",
    "signer": "0xcd9913A048e4a4e2506C685DDFe6c47f5F4E02B2",
    "userId": "321125642"
  }
}