{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578268836",
    "entityType": "User",
    "nonce": "0x87145b191bfeae217a52bba0f3dfd42be3a9d8cc8d2c2ec4c3639f9a14ccb5e8",
    "signature": "0x749bd57aee07e8ba3f05c42bd85c3f39535f5fbac401b28b7be9c3146acf08be1e9857f17faba9ebdbbd31efc1164f012a05db24bb2875ad6b841b72354d0d2e1c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}