{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1438540",
    "entityType": "User",
    "nonce": "0x99aaacbe8407e6369685ae32911f5c5a72207ce2a80fadd09dc4dd3e5796721a",
    "signature": "0x2c7220622a6b07cb7091778024da072a3334da56f2e9462bff2ecdbdaf2afa7821620df17d13096a90da8adbc1c22eb997b55d06838feec94933c96ab2a554c71b",
    "signer": "0xe1EBB2b0eed447a94b95294C357cc71235152A13",
    "userId": "888593291"
  }
}