{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319048",
    "entityType": "User",
    "nonce": "0x10ad39776d5dcf083323399b0df6b586948b366ff7daafb22636fae5fc98c32a",
    "signature": "0xddc9e0f4ff855ef7a62c64595591eed418d063dc4b44f0bd88b8e319df6651f97bdb2eca8d53f765917467185c9eac2d8af022ff4880072c37323d8f3bfe67301c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}