{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20512",
    "entityType": "User",
    "nonce": "0x2b7abe8d63889c65946a94f85031349212ff8401bc00958595b617060007d82b",
    "signature": "0x4b091fe5a67e294128043cc94a70ca8a0332eb18334003b87f78db3bb726db9d5923530ac619d8280725d02d1a50e00421fc18044898f146958ad3d8180257da1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}