{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x18484c851189639c34f6baa19b43d9b2f936e55a30effc5dffa3344198758680",
    "signature": "0x1554d81c6f73c67a48704046473a31768432b77f0c84aad95a800ed47043de0f75f213d1d074b80653f7a317be73ed4441d0c075a5a4583fe3aee4492660e4ba1c",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}