{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340290344",
    "entityType": "User",
    "nonce": "0xa7e1615422c410a1b03a07f02bf85d22dca0b33ebee6f27656401889cc52a9a3",
    "signature": "0xfc47c5c1a3e65df65e6ebfe6510290ec1d0a7cf8501b43c4bb7f9eb66b4546e238f3ae89fc815b30e179b7374ba54ed65e05839eb495de1d7db048030774ce861b",
    "signer": "0x32B0332272E4aDf7c8afA6cfa7ea34b85F773d72",
    "userId": "347088841"
  }
}