{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0x7269feaf50624ea3c68f7ef18c050c80b4890c761034d9936e91712975b2f3b0",
    "signature": "0xbac2f45b3f8ae34d22505dc44a75316e91053ad514cedf26efec736bb973748b3b3f0378eb6170bb051ea89d4194b2533e625a7da0b9180a1333d0a4c56e310b1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}