{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd183f2be1ef8a72af372e4e48c88f27680b8cc308875e77203394cc1704c19fd",
    "signature": "0x0ab2dda2f8cbc34b4e20f7d2d3613fff666b8581fb2b5c330132f242fa18f6a83e8444364f90e8b19d3f2b192e59790b1664a8e606737e01b9b4703c0eafe7e51b",
    "signer": "0xE7135877c189EE7110dE64652fe2eA47241785b4",
    "userId": "181000611"
  }
}