{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1319400",
    "entityType": "User",
    "nonce": "0x9f0cdc9f82df2d8c871a2edac611f043c255d387dca49533282636a9ea44d8b0",
    "signature": "0x8b64082e267f4d2be833c0a0979404264dc6c99704980bfa660777440b02aaf310d943a22cfd528706638b20463784193475fdf978d5475ecbff3d90d88478581b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}