{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1892553",
    "entityType": "User",
    "nonce": "0x74e4bb16e129336e36858b392bc62fbf43482c8197b6a2639437ddcc8ad27c05",
    "signature": "0xaa0301e744dd82d77e0c6063bb2df940eefc9a45d18afdd9b8dc951c1d0b5ef37b7c4c8b796260438ad64b814e79365c34b22873e9292197e9e5e48963c147691c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}