{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x943dd5a26ebda6daae33d676dcf861af7178f8eff5a820a428dff541ea9c462f",
    "signature": "0x29dfd6e51af61c7581c6799ddc788dc2864141aa04b22a46609ef2d81ab56afa020b58fd22c56cb18693800d40f1de715f66096f793546ce4c56f0d76a6fad721c",
    "signer": "0x449418feaBA25A39aE410F0c64EB2473D7e608D3",
    "userId": "629879678"
  }
}