{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "644286186",
    "entityType": "User",
    "nonce": "0x63d65fbc41d7af955e27ec2abe2507964d03fbf40124e4986da3501354d82bf2",
    "signature": "0xd5db51a136591aa518f9b10609e163118669b8f358dbeb7438e2f7eee61802c051414b81e0586327f0f487ca474d5a3d6e606fccd058b80fdfe2df29312f010a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}