{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "639458780",
    "entityType": "User",
    "nonce": "0x14a300c715bb67e98dfb8696922041f285f2cf4fd84df701afb54c84440e2777",
    "signature": "0x5452057b8c3f121c4a6f7c4ca68fbb6a25f977d65166686a116d99a90d1a51040a031c3450388573a7c1c0f8e12eceab258a0814ec68f21d6b9f5974fbf1ac0b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}