{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeb1a3ee226f28e0afa8f42c5b3cddbce0a148072a723de7a64406994410c795d",
    "signature": "0xc6e6b7ab2825b50b859cf8b23b654f7a51d1d8a009de8c2275bfdad08774a653040de688e1b5e1676074e6ba7f9a2520bc123132a062dbacfb45306f7e6489081c",
    "signer": "0x0F5E20DcC1F197d06b24ebF218eaA644767E87c0",
    "userId": "423712211"
  }
}