{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121508",
    "entityType": "User",
    "nonce": "0x8e04da1e0752306c6bfa8fd489fdf4a0316594804ab6ca757fa9f76c7046f2e4",
    "signature": "0x8b141c5ee3525ccc36d2b1b2e2c178e55badea2e06c08183394cda3b44d9b4ba1cbd1e2e49403f15e3b7ea4be1e6e7993a98dde1c8e1fe57da377e2ed51c8d981b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}