{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa1e2d7148cd1e952865eba60eb39cf6313c574722a38b541a26d6c8b21ac28eb",
    "signature": "0x4e20a47795f3fa08c4b99af98684e4b0680f70033bc4e33c8cb286202adde36b78f9abbdd9ed499e13ec46ff65f5761ed6ee0c2de56b83a1c7d50c1a0e3749c11c",
    "signer": "0xCaE1ee7dc4DB493ceab857fd89C09fA305C4c5d4",
    "userId": "648743045"
  }
}