{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343301",
    "entityType": "User",
    "nonce": "0x18c49063d090b802ea22ac704142b1fe74abf0aadd9998c46cbf30524a73b364",
    "signature": "0x89c8f9e7adedc6c796abb3e85343ecbb20b2a7bc34431854da01332b478614993e04a8b19f2670569bacfd6aae2d8d965000def07596d5bfd36f883801d550ed1c",
    "signer": "0x73C69e0c0a50f0E228106C863e362C350a86Af87",
    "userId": "190031"
  }
}