{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2f7ffb52ac9f8678cf2a7020f4d9251b5576f9c6d80ecd8198e0347799838c9f",
    "signature": "0x1b3097f4fb5c314e59fb8bf0ce486aa0b6d752f5a0c847382d49306a2c0251d4110f9fe8b2a45d295ea8271df4a6497547863f76d20a84bfaaeca47b926624601b",
    "signer": "0x73760064D08e854716c13081dE151D63b16b2Fb0",
    "userId": "646161559"
  }
}