{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319048",
    "entityType": "User",
    "nonce": "0x7d3bc2ab9288883babf7cfb01d494dca02b1f36ebfbbd0bb46feee07efa6109a",
    "signature": "0x521aabd02d9620bfd452ebb052b09fbf25a517ab722a1bc7d567599b8b13be3c42dde40f39d5a73b0447745bc1e67759bf59b431109a35cd3047d6247331d8c21c",
    "signer": "0x7a78569646ADa00a4d555F20fA48e9cDb9ef14F5",
    "userId": "333304008"
  }
}