{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21228",
    "entityType": "User",
    "nonce": "0xb1f3a1136e9e8eb66bf0c7f212aeee3633fc3b13ca4f1ec4162cac2ef467062c",
    "signature": "0xb2cb467c2923e8df68e42c3d129741c6759767219262230d29d16e83b45d9f4b62856ee59ddb9e7151abad0e57f26932f54cfb6188ced5372c6a84ef841c8c3c1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}