{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0xb63cc8813aea4116cfe7eb6bddb09b937cd251282306e585c073fe79156527da",
    "signature": "0x358e8d5032642dd3feffb2f547b16de0df8604e4338f758a6abc5cb2571f0d5e609b7a899ff03f7a70dbf529c45ee1033260f6b24d1b63b94b8849788578e8af1b",
    "signer": "0x168ff3b3F21912D4d676468A80Ee2af0E2F24a59",
    "userId": "124431641"
  }
}