{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681866568",
    "entityType": "User",
    "nonce": "0xb387b0cf43b094dd0cf793079d4ea64218d5311e33a13c1089700207c392c9b5",
    "signature": "0x5e55a54c70a758fa01fe0ccaa6c8fc3408dd08c3df91ee03dc2292189d0064f36dea068ce0043b3336af2f51b67f6ef79dce1a7923d83f190140ca12af07471a1b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}