{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449547",
    "entityType": "User",
    "nonce": "0x83849afd345d610951741a3561086c27dd27f5e06d1d28c4e32b0a158e47f4d9",
    "signature": "0x3de9d995472cb7ef82bf8171a89e01bbd90a3090b667f7237309285d23f9d1d542c3c8ed0409dd8f0085f40a127ad249348cf5dd53feea4667b0c74bfa5e4bbe1c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}