{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb9811e20551b26de1572af496a64c2b4409cc5dff8b4bd81f4803c03f22158c6",
    "signature": "0x678df28f971ec0ea193601905b005683e7c31faba3ba0ac0a2e1e7cc5d54ebe575e4f874f8fb368bdd01dd2f088b24ab65c8ab76d853755a46d48c5c83affd741b",
    "signer": "0x7eDd588D6dbD5749DfaEc053aCC9D43742c496d5",
    "userId": "172937896"
  }
}