{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449",
    "entityType": "User",
    "nonce": "0xc732035ca47d2b505d867838c5f4b057634d1f9ddded0162e3e455964d00ec52",
    "signature": "0xafa051feef308f35255e4691f13a072400955420533a7dc8c6bd4a6b5502dc6071520f10812a1c153b16c67db257af9713bc9651679a317a9ff68cd70fd1a0a91c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}