{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688850395",
    "entityType": "User",
    "nonce": "0x85e4d9549691e9feb60ff86b75237a9c2495daa41c1c98f41b355b6d8f02fdde",
    "signature": "0x54acd1b9b576ac3e63538f0d9dcf1f442c122104c045353c1214c5428a5b4fa96ec0c743470a91cac24c0fb3cfb5a6dfd7f20fa1f9cabc327ff89573e97d3f5c1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}