{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4a2914844bc3bca4d81e2816c6a85afdfb982a03cc8f0d9dfd7fa1408a73f9b8",
    "signature": "0x8a1e143395b80058dec8980d4fbcf0a61a021fd994845feb81d68c034e533bdb4e3a528a026796bf45c9107445d851928b90b4e4800d96c80e3eb69dd2879bb01c",
    "signer": "0x2A5FAa19C84dAdAC2355a17b2c6E12Aa3c0014A7",
    "userId": "216889217"
  }
}