{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa53fcc2cec64f6cdca51fb199a8583a1ed88ba122d7315582a7972524082d24f",
    "signature": "0x2278e8af762d9608d1b51c7b259c687493dcaf63a8bffbbe94310838be357a084851a09748b218d709769fa42971f872a5577f00d9fc570527e4e89f058aad541b",
    "signer": "0xA548541CB1DAE75CF06C54A05712F4C6f4E61C0C",
    "userId": "283435997"
  }
}