{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "751011",
    "entityType": "User",
    "nonce": "0xc6fd19abc10b31c399000aaaeb3826add1af4ea966235a0b3312b5258ad1dab2",
    "signature": "0xca92643a8e6b779cb75f6d601449d31dc1a1d14a2ea051b5e39579973ee64cba412cbc5c1966b97fc86957071bf6cfe0d4dc788888172d376779b8da16ee4ea81c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}