{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7538",
    "entityType": "User",
    "nonce": "0x0bdab4b0b5754b38c7d9d74458ac2386ac76afaa862f92c1ae8666a40fda141c",
    "signature": "0x70875774807b1d6205ace9b74d7079048062431634b78802fcc338465664487d33849048277cfb8094bae329e6cb89c667dda3b77a81e81962089dc2090336331b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}