{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2b3cf87957f6c35e439a0004ceccf1bc77620a2a9439729fe806bf36640bb84f",
    "signature": "0x3e7b76dfa758b497792591bd4e46c71c09602ccbca3304cb68648f578fab82e22319885b262acf4d8d441c777b5be91a957f2f8cd67527e9989068bb9c6649731b",
    "signer": "0x9AC1C4307292501c693bF6378F6E04B88640554c",
    "userId": "674646578"
  }
}