{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0xa44abc738c5d9312d1fb84f7ea083afdd1830bef1e98d0bc8565e10b12649cde",
    "signature": "0x374d75cde2ab3ccbb96ed3f67a2a353e2981d2a8f73f5e33a0ee6ccbf1ff5889098b70ebc92a8ccfe620dbbff71cde006a1321dd6439ff54098e9c87fc7e5f0e1c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}