{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615703",
    "entityType": "User",
    "nonce": "0x2f909b3c49d53cc52b13c727357fd4e8ef019242bf7e25a230203b550df4b4f8",
    "signature": "0xe9b6dd5273a46abdcc61d370d130aa474aae6bf32518242f4b5519a0fbf20bcd0f7233474787088ae59395921980acfa7f8ebd6e33c6839a340116b3014856e81b",
    "signer": "0xE726D55D6940a70995Ce9D8aa1aCE76FC6f4f544",
    "userId": "285113781"
  }
}