{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0xa1be2d3f387a5ba413d6d9b39d531cef54ef5df3371681bef61062bef038b9ca",
    "signature": "0x0c77d54efb21aa4f18b4acab3f0f7709d1f46ca4079d6cab323af4c0090daa000fafa6df9cca0826a3d8647b10355fc3b0eabbdf2f51ee31d1e69a15cbdc59fd1c",
    "signer": "0xb87fFF581cC87c41f5760cBc657a96Fa1C7673E3",
    "userId": "648196771"
  }
}