{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5519",
    "entityType": "User",
    "nonce": "0xf4c3039f90aba882b73bd2af6d5066da6d732b6c359f3ba779b57521a7d80641",
    "signature": "0x3d4533213c328e4337e8e67d0e35f49d73a2aa3d54420d793a9284bfd89094db668cb665471a511139ae0ebd5e0d22a88322694d1cad388454dcaee5ca529aed1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}