{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "757227",
    "entityType": "User",
    "nonce": "0x8fd4ddd06f6601f64a6ed168a50bc127bcc11d08f923578a7c5de2ca7d888b41",
    "signature": "0x508b56e56d01219c1f8197954ca454bc0c69e2f5e1c3924f78bdf1fb7ddf861f72dc73d21bab93d0c5554f17a2934f339b67a0c7cdefe3db6e3147d5b6f973e11c",
    "signer": "0x45dd4B563AbeCaB329e918D13925cDdFBca768C3",
    "userId": "265042309"
  }
}