{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778553",
    "entityType": "User",
    "nonce": "0xd9bb5f67f7f9be4440345e3fffc90b58c1c53f7fcab06ce077ed94d2dae21b2f",
    "signature": "0x12fa92f85c4da5d8e6439a26a6315d9502c9210ffdd6ff18b3bd6bc784fb6f913d0251e75abe7c403526275ba3db20c9dd31385c4c133aa1b1f0adf5d749dd461c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}