{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x19b244bf88c1b11ee94ffc0fadb40bc1ade0636266a46c47620711b64b944cad",
    "signature": "0x61e0e262f6b999667b997df26e3621a4aa62973a9a55da7a3278f8cb273729da10cb922d5bfd607d5c39d1c55a1c68eeeb37647c3a22f9bcac8de9958cc1b0781c",
    "signer": "0x5FAebc5457E64298d2Ef1813dbfccc0F5bB3C4E7",
    "userId": "648790234"
  }
}