{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881124",
    "entityType": "User",
    "nonce": "0xc2e9be422655762338e008abadc09d07952f25a7ef31da249c4bfd8284227e54",
    "signature": "0xe4daadd20a52c0b8e834977191098a3ffca76d0e3998175d4328d25c7bd55eb52cb9af76ad223f6b5e9880b374d0251c60c90cb1d18c0fce87bb727c4fae85261c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}