{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x197480951a621ba0d2b5298ceaaef06f9a8bb0924b905adedae522ffd0a66703",
    "signature": "0x5a5f928de7f6646bcd8bd2525b8730780498e80f222c9aaecb423fc6b64c8bd05904c9623deb2c69abc43ccd9c317fe02fb1dc6e7b336c9a84dab03946aff1ea1c",
    "signer": "0x4aE574382b0b09bBb498DbaCCea3A3C0914883c9",
    "userId": "619112688"
  }
}