{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456213",
    "entityType": "User",
    "nonce": "0xa557b1c51467351848bd8962cda356ca72d1bcaadfb5ada38c3545f094c6b28a",
    "signature": "0x2f83ff19b628acc6b637f7b21a924d8f380dd1874dad6039c9ca4adec50924a51218cfbe61b7b553bbb2aab4dc8e48c923b6b8bf15b387dcd2af4d3242c7a7551c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}