{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x20921bdcf0065f158f5ddc434759d88175dceba06d3b1a7a12d6c37cd024643f",
    "signature": "0xee1891a1955e1d185b75a5ee61c03ad4830f4968d7f4575b5c3d5b9fcecd5140241bcc72da7174d7fb63d0d7050584baa9d7931c1f2d94a0009a9395a4e2053b1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}