{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7610cccb430a8e973ee473e533daaa0896eb46f6ceae70f7b420126921a8a6fd",
    "signature": "0x00707dce048d48d811e0fba3d34a44487238954ac1de497b5a34c279c5e9b79b0a2987f09bfbef543d002b0badc57ed890af795e98ad4b11052a6748e78e66901c",
    "signer": "0xE178a8926535369d63e75CDabE74c05002609f07",
    "userId": "90770329"
  }
}